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2. Tracking data highlight the importance of human-induced mortality for large migratory birds at a flyway scale

Author

Serratosa, Juan, Oppel, Steffen, Rotics, Shay, Santangeli, Andrea, Butchart, Stuart H.M., Cano-Alonso, Luis S., Tellería, Jose Luis, Kemp, Ryno, Nicholas, Aaron, Kalvāns, Aigars, Galarza, Aitor, Franco, Aldina M.A., Andreotti, Alessandro, Kirschel, Alexander N.G., Ngari, Alex, Soutullo, Alvaro, Bermejo-Bermejo, Ana, Botha, Andre J., Ferri, Andrea, Evangelidis, Angelos, Cenerini, Anna, Stamenov, Anton, Hernández-Matías, Antonio, Aradis, Arianna, Grozdanov, Atanas P., Rodríguez, Beneharo, Şekercioğlu, Çağan H., Cerecedo-Iglesias, Catuxa, Kassara, Christina, Barboutis, Christos, Bracebridge, Claire, García-Ripollés, Clara, Kendall, Corinne J., Denac, Damijan, Schabo, Dana G., Barber, David R., Popov, Dimitar V., Dobrev, Dobromir D., Mallia, Egidio, Kmetova-Biro, Elena, Álvarez, Ernesto, Buechley, Evan R., Bragin, Evgeny A., Cordischi, Fabrizio, Zengeya, Fadzai M., Monti, Flavio, Mougeot, Francois, Tate, Gareth, Stoyanov, Georgi, Dell'Omo, Giacomo, Lucia, Giuseppe, Gradev, Gradimir, Ceccolini, Guido, Friedemann, Guilad, Bauer, Hans-Günther, Kolberg, Holger, Peshev, Hristo, Catry, Inês, Øien, Ingar J., Alanís, Isidoro Carbonell, Literák, Ivan, Pokrovsky, Ivan, Ojaste, Ivar, Østnes, Jan E., de la Puente, Javier, Real, Joan, Guilherme, João L., González, José C., Fernández-García, José M., Gil, Juan Antonio, Terraube, Julien, Poprach, Karel, Aghababyan, Karen, Klein, Katharina, Bildstein, Keith L., Wolter, Kerri, Janssens, Kjell, Kittelberger, Kyle D., Thompson, Lindy J., AlJahdhami, Mansoor H., Galán, Manuel, Tobolka, Marcin, Posillico, Mario, Cipollone, Mario, Gschweng, Marion, Strazds, Māris, Boorman, Mark, Zvidzai, Mark, Acácio, Marta, Romero, Marta, Wikelski, Martin, Schmidt, Matthias, Sarà, Maurizio, McGrady, Michael J., Dagys, Mindaugas, Mackenzie, Monique L., Al Taq, Muna, Mgumba, Msafiri P., Virani, Munir Z., Kassinis, Nicolaos I., Borgianni, Nicolò, Thie, Nikki, Tsiopelas, Nikos, Anglister, Nili, Farwig, Nina, Sapir, Nir, Kleven, Oddmund, Krone, Oliver, Duriez, Olivier, Spiegel, Orr, Al Nouri, Osama, López-López, Pascual, Byholm, Patrik, Kamath, Pauline L., Mirski, Paweł, Palatitz, Peter, Serroni, Pietro, Raab, Rainer, Buij, Ralph, Žydelis, Ramūnas, Nathan, Ran, Bowie, Rauri C.K., Tsiakiris, Rigas, Hatfield, Richard Stratton, Harel, Roi, Kroglund, Rolf T., Efrat, Ron, Limiñana, Ruben, Javed, Salim, Marinković, Saša P., Rösner, Sascha, Pekarsky, Sasha, Kapila, Shiv R., Marin, Simeon A., Krejčí, Šimon, Giokas, Sinos, Tumanyan, Siranush, Turjeman, Sondra, Krüger, Sonja C., Ewing, Steven R., Stoychev, Stoycho, Nikolov, Stoyan C., Qaneer, Tareq E., Spatz, Theresa, Hadjikyriakou, Thomas G., Mueller, Thomas, Katzner, Todd E., Aarvak, Tomas, Veselovský, Tomáš, Nygård, Torgeir, Mellone, Ugo, Väli, Ülo, Sellis, Urmas, Urios, Vicente, Nemček, Vladimír, Arkumarev, Volen, Getz, Wayne M., Fiedler, Wolfgang, Van den Bossche, Willem, Lehnardt, Yael, and Jones, Victoria R.

Published
2024
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3. A multi-species evaluation of digital wildlife monitoring using the Sigfox IoT network

Author

Wild, Timm A., van Schalkwyk, Louis, Viljoen, Pauli, Heine, Georg, Richter, Nina, Vorneweg, Bernd, Koblitz, Jens C., Dechmann, Dina K. N., Rogers, Will, Partecke, Jesko, Linek, Nils, Volkmer, Tamara, Gregersen, Troels, Havmøller, Rasmus W., Morelle, Kevin, Daim, Andreas, Wiesner, Miriam, Wolter, Kerri, Fiedler, Wolfgang, Kays, Roland, Ezenwa, Vanessa O., Meboldt, Mirko, and Wikelski, Martin

Published
2023
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5. Understanding continent-wide variation in vulture ranging behavior to assess feasibility of Vulture Safe Zones in Africa: Challenges and possibilities

Author

Kane, Adam, Monadjem, Ara, Aschenborn, H.K. Ortwin, Bildstein, Keith, Botha, André, Bracebridge, Claire, Buechley, Evan R., Buij, Ralph, Davies, John P., Diekmann, Maria, Downs, Colleen T., Farwig, Nina, Galligan, Toby, Kaltenecker, Gregory, Kelly, Chris, Kemp, Ryno, Kolberg, Holger, MacKenzie, Monique L., Mendelsohn, John, Mgumba, Msafiri, Nathan, Ran, Nicholas, Aaron, Ogada, Darcy, Pfeiffer, Morgan B., Phipps, W. Louis, Pretorius, Mattheuns D., Rösner, Sascha, Schabo, Dana G., Shatumbu, Gabriel Lita, Spiegel, Orr, Thompson, Lindy J., Venter, Jan A., Virani, Munir, Wolter, Kerri, and Kendall, Corinne J.

Published
2022
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7. Tracking data highlight the importance of human-induced mortality for large migratory birds at a flyway scale

Author

Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales, Universidad de Alicante. Departamento de Didáctica General y Didácticas Específicas, Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Serratosa, Juan, Oppel, Steffen, Rotics, Shay, Santangeli, Andrea, Butchart, Stuart H.M., Cano-Alonso, Luis S., Tellería Jorge, José Luis, Kemp, Ryno, Nicholas, Aaron, Kalvāns, Aigars, Galarza, Aitor, Franco, Aldina M.A., Andreotti, Alessandro, Kirschel, Alexander N.G., Ngari, Alex, Soutullo, Alvaro, Bermejo, Ana, Botha, Andre J., Ferri, Andrea, Evangelidis, Angelos, Cenerini, Anna, Stamenov, Anton, Hernández-Matías, Antonio, Aradis, Arianna, Grozdanov, Atanas P., Rodríguez, Beneharo, Sekercioğlu, Cağan H., Cerecedo-Iglesias, Catuxa, Kassara, Christina, Barboutis, Christos, Bracebridge, Claire, García Ripollés, Clara, Kendall, Corinne J., Denac, Damijan, Schabo, Dana G., Barber, David R., Popov, Dimitar V., Dobrev, Dobromir D., Mallia, Egidio, Kmetova-Biro, Elena, Álvarez, Ernesto, Buechley, Evan R., Bragin, Evgeny A., Cordischi, Fabrizio, Zengeya, Fadzai M., Monti, Flavio, Mougeot, François, Tate, Gareth, Stoyanov, Georgi, Dell’Omo, Giacomo, Lucia, Giuseppe, Gradev, Gradimir, Ceccolini, Guido, Friedemann, Guilad, Bauer, Hans-Günther, Kolberg, Holger, Peshev, Hristo, Catry, Inês, Øien, Ingar J., Carbonell Alanís, Isidoro, Literák, Ivan, Pokrovsky, Ivan, Ojaste, Ivar, Østnes, Jan E., Puente, Javier de la, Real, Joan, Guilherme, João L., González, José C., Fernández-García, José M., Gil, Juan Antonio, Terraube, Julien, Poprach, Karel, Aghababyan, Karen, Klein, Katharina, Bildstein, Keith L., Wolter, Kerri, Janssens, Kjell, Kittelberger, Kyle D., Thompson, Lindy J., AlJahdhami, Mansoor H., Galán, Manuel, Tobolka, Marcin, Posillico, Mario, Cipollone, Mario, Gschweng, Marion, Strazds, Māris, Boorman, Mark, Zvidzai, Mark, Acácio, Marta, Romero, Marta, Wikelski, Martin, Schmidt, Matthias, Sarà, Maurizio, McGrady, Michael J., Dagys, Mindaugas, Mackenzie, Monique L., Al Taq, Muna, Mgumba, Msafiri P., Virani, Munir Z., Kassinis, Nicolaos I., Borgianni, Nicolò, Thie, Nikki, Tsiopelas, Nikos, Anglister, Nili, Farwig, Nina, Sapir, Nir, Kleven, Oddmund, Krone, Oliver, Duriez, Olivier, Spiegel, Orr, Al Nouri, Osama, López-López, Pascual, Byholm, Patrik, Kamath, Pauline L., Mirski, Paweł, Palatitz, Peter, Serroni, Pietro, Raab, Rainer, Buij, Ralph, Žydelis, Ramūnas, Nathan, Ran, Bowie, Rauri C.K., Tsiakiris, Rigas, Hatfield, Richard Stratton, Harel, Roi, Kroglund, Rolf T., Efrat, Ron, Limiñana, Rubén, Javed, Salim, Marinković, Saša P., Rösner, Sascha, Pekarsky, Sasha, Kapila, Shiv R., Marin, Simeon, Krejčí, Šimon, Giokas, Sinos, Tumanyan, Siranush, Turjeman, Sondra, Krüger, Sonja C., Ewing, Steven R., Stoychev, Stoycho, Nikolov, Stoyan C., Qaneer, Tareq E., Spatz, Theresa, Hadjikyriakou, Thomas G., Mueller, Thomas, Katzner, Todd E., Aarvak, Tomas, Veselovský, Tomáš, Nygård, Torgeir, Mellone, Ugo, Väli, Ülo, Sellis, Urmas, Urios, Vicente, Nemček, Vladimír, Arkumarev, Volen, Getz, Wayne M., Fiedler, Wolfgang, Van den Bossche, Willem, Lehnardt, Yael, Jones, Victoria R., Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales, Universidad de Alicante. Departamento de Didáctica General y Didácticas Específicas, Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Serratosa, Juan, Oppel, Steffen, Rotics, Shay, Santangeli, Andrea, Butchart, Stuart H.M., Cano-Alonso, Luis S., Tellería Jorge, José Luis, Kemp, Ryno, Nicholas, Aaron, Kalvāns, Aigars, Galarza, Aitor, Franco, Aldina M.A., Andreotti, Alessandro, Kirschel, Alexander N.G., Ngari, Alex, Soutullo, Alvaro, Bermejo, Ana, Botha, Andre J., Ferri, Andrea, Evangelidis, Angelos, Cenerini, Anna, Stamenov, Anton, Hernández-Matías, Antonio, Aradis, Arianna, Grozdanov, Atanas P., Rodríguez, Beneharo, Sekercioğlu, Cağan H., Cerecedo-Iglesias, Catuxa, Kassara, Christina, Barboutis, Christos, Bracebridge, Claire, García Ripollés, Clara, Kendall, Corinne J., Denac, Damijan, Schabo, Dana G., Barber, David R., Popov, Dimitar V., Dobrev, Dobromir D., Mallia, Egidio, Kmetova-Biro, Elena, Álvarez, Ernesto, Buechley, Evan R., Bragin, Evgeny A., Cordischi, Fabrizio, Zengeya, Fadzai M., Monti, Flavio, Mougeot, François, Tate, Gareth, Stoyanov, Georgi, Dell’Omo, Giacomo, Lucia, Giuseppe, Gradev, Gradimir, Ceccolini, Guido, Friedemann, Guilad, Bauer, Hans-Günther, Kolberg, Holger, Peshev, Hristo, Catry, Inês, Øien, Ingar J., Carbonell Alanís, Isidoro, Literák, Ivan, Pokrovsky, Ivan, Ojaste, Ivar, Østnes, Jan E., Puente, Javier de la, Real, Joan, Guilherme, João L., González, José C., Fernández-García, José M., Gil, Juan Antonio, Terraube, Julien, Poprach, Karel, Aghababyan, Karen, Klein, Katharina, Bildstein, Keith L., Wolter, Kerri, Janssens, Kjell, Kittelberger, Kyle D., Thompson, Lindy J., AlJahdhami, Mansoor H., Galán, Manuel, Tobolka, Marcin, Posillico, Mario, Cipollone, Mario, Gschweng, Marion, Strazds, Māris, Boorman, Mark, Zvidzai, Mark, Acácio, Marta, Romero, Marta, Wikelski, Martin, Schmidt, Matthias, Sarà, Maurizio, McGrady, Michael J., Dagys, Mindaugas, Mackenzie, Monique L., Al Taq, Muna, Mgumba, Msafiri P., Virani, Munir Z., Kassinis, Nicolaos I., Borgianni, Nicolò, Thie, Nikki, Tsiopelas, Nikos, Anglister, Nili, Farwig, Nina, Sapir, Nir, Kleven, Oddmund, Krone, Oliver, Duriez, Olivier, Spiegel, Orr, Al Nouri, Osama, López-López, Pascual, Byholm, Patrik, Kamath, Pauline L., Mirski, Paweł, Palatitz, Peter, Serroni, Pietro, Raab, Rainer, Buij, Ralph, Žydelis, Ramūnas, Nathan, Ran, Bowie, Rauri C.K., Tsiakiris, Rigas, Hatfield, Richard Stratton, Harel, Roi, Kroglund, Rolf T., Efrat, Ron, Limiñana, Rubén, Javed, Salim, Marinković, Saša P., Rösner, Sascha, Pekarsky, Sasha, Kapila, Shiv R., Marin, Simeon, Krejčí, Šimon, Giokas, Sinos, Tumanyan, Siranush, Turjeman, Sondra, Krüger, Sonja C., Ewing, Steven R., Stoychev, Stoycho, Nikolov, Stoyan C., Qaneer, Tareq E., Spatz, Theresa, Hadjikyriakou, Thomas G., Mueller, Thomas, Katzner, Todd E., Aarvak, Tomas, Veselovský, Tomáš, Nygård, Torgeir, Mellone, Ugo, Väli, Ülo, Sellis, Urmas, Urios, Vicente, Nemček, Vladimír, Arkumarev, Volen, Getz, Wayne M., Fiedler, Wolfgang, Van den Bossche, Willem, Lehnardt, Yael, and Jones, Victoria R.

Abstract

Human-induced direct mortality affects huge numbers of birds each year, threatening hundreds of species worldwide. Tracking technologies can be an important tool to investigate temporal and spatial patterns of bird mortality as well as their drivers. We compiled 1704 mortality records from tracking studies across the African-Eurasian flyway for 45 species, including raptors, storks, and cranes, covering the period from 2003 to 2021. Our results show a higher frequency of human-induced causes of mortality than natural causes across taxonomic groups, geographical areas, and age classes. Moreover, we found that the frequency of human-induced mortality remained stable over the study period. From the human-induced mortality events with a known cause (n = 637), three main causes were identified: electrocution (40.5 %), illegal killing (21.7 %), and poisoning (16.3 %). Additionally, combined energy infrastructure-related mortality (i.e., electrocution, power line collision, and wind-farm collision) represented 49 % of all human-induced mortality events. Using a random forest model, the main predictors of human-induced mortality were found to be taxonomic group, geographic location (latitude and longitude), and human footprint index value at the location of mortality. Despite conservation efforts, human drivers of bird mortality in the African-Eurasian flyway do not appear to have declined over the last 15 years for the studied group of species. Results suggest that stronger conservation actions to address these threats across the flyway can reduce their impacts on species. In particular, projected future development of energy infrastructure is a representative example where application of planning, operation, and mitigation measures can enhance bird conservation.

Published
2024

13. A utilization distribution for the global population of Cape Vultures ( Gyps coprotheres ) to guide wind energy development

Author

Cervantes, Francisco, primary, Murgatroyd, Megan, additional, Allan, David G., additional, Farwig, Nina, additional, Kemp, Ryno, additional, Krüger, Sonja, additional, Maude, Glyn, additional, Mendelsohn, John, additional, Rösner, Sascha, additional, Schabo, Dana G., additional, Tate, Gareth, additional, Wolter, Kerri, additional, and Amar, Arjun, additional

Published
2023
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14. A multi-species evaluation of digital wildlife monitoring using the Sigfox IoT network

Author

Wild, Timm A., primary, Schalkwyk, Louis van, additional, Viljoen, Pauli, additional, Heine, Georg, additional, Richter, Nina, additional, Vorneweg, Bernd, additional, Koblitz, Jens C., additional, Dechmann, Dina K. N., additional, Rogers, Will, additional, Partecke, Jesko, additional, Linek, Nils, additional, Volkmer, Tamara, additional, Gregersen, Troels, additional, Havmøller, Rasmus W., additional, Morelle, Kevin, additional, Daim, Andreas, additional, Wiesner, Miriam, additional, Wolter, Kerri, additional, Fiedler, Wolfgang, additional, Kays, Roland, additional, Ezenwa, Vanessa O., additional, Meboldt, Mirko, additional, and Wikelski, Martin, additional

Published
2022
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15. A utilization distribution for the global population of Cape Vultures (Gypscoprotheres) to guide wind energy development.

Author

Cervantes, Francisco, Murgatroyd, Megan, Allan, David G., Farwig, Nina, Kemp, Ryno, Krüger, Sonja, Maude, Glyn, Mendelsohn, John, Rösner, Sascha, Schabo, Dana G., Tate, Gareth, Wolter, Kerri, and Amar, Arjun

Subjects
ENERGY development, VULTURES, WIND power, RENEWABLE energy sources, ENERGY conservation, SUSTAINABLE development
Abstract

The rapid development of wind energy in southern Africa represents an additional threat to the already fragile populations of African vultures. The distribution of the vulnerable Cape Vulture Gyps coprotheres overlaps considerably with wind energy development areas in South Africa, creating conflicts that can hinder both vulture conservation and sustainable energy development. To help address this conflict and aid in the safe placement of wind energy facilities, we map the utilization distribution (UD) of this species across its distributional range. Using tracking data from 68 Cape Vultures collected over the last 20 years, we develop a spatially explicit habitat use model to estimate the expected UDs around known colonies. Scaling the UDs by the number of vultures expected to use each of the colonies, we estimate the Cape Vulture population utilization distribution (PUD) and determine its exposure to wind farm impacts. To complement our results, we model the probability of a vulture flying within the rotor sweep area of a wind turbine throughout the species range and use this to identify areas that are particularly prone to collisions. Overall, our estimated PUD correlates well with reporting rates of the species from the Southern African Bird Atlas Project, currently used to assess potential overlap between Cape Vultures and wind energy developments, but it adds important benefits, such as providing a spatial gradient of activity estimates over the entire species range. We illustrate the application of our maps by analyzing the exposure of Cape Vultures in the Renewable Energy Development Zones (REDZs) in South Africa. This application is a scalable procedure that can be applied at different planning phases, from strategic, nationwide planning to project‐level assessments. [ABSTRACT FROM AUTHOR]

Published
2023
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26. Variation in monthly sizes of home‐ranges of Hooded Vultures Necrosyrtes monachus in western, eastern and southern Africa

Author

Thompson, Lindy J., primary, Barber, David R., additional, Bechard, Marc J., additional, Botha, André J., additional, Wolter, Kerri, additional, Neser, Walter, additional, Buechley, Evan R., additional, Reading, Richard, additional, Garbett, Rebecca A., additional, Hancock, Pete, additional, Maude, Glyn, additional, Virani, Munir Z., additional, Thomsett, Simon, additional, Lee, Hansoo, additional, Ogada, Darcy, additional, Barlow, Clive R., additional, and Bildstein, Keith L., additional

Published
2020
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28. Large birds travel farther in homogeneous environments

Author

Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales, Universidad de Alicante. Departamento de Didáctica General y Didácticas Específicas, Tucker, Marlee A., Alexandrou, Olga, Bierregaard Jr., Richard O., Bildstein, Keith L., Böhning‐Gaese, Katrin, Bracis, Chloe, Brzorad, John N., Buechley, Evan R., Cabot, David, Calabrese, Justin M., Carrapato, Carlos, Chiaradia, Andre, Davenport, Lisa C., Davidson, Sarah C., Desholm, Mark, DeSorbo, Christopher R., Domenech, Robert, Enggist, Peter, Fagan, William F., Farwig, Nina, Fiedler, Wolfgang, Fleming, Christen H., Franke, Alastair, Fryxell, John M., García Ripollés, Clara, Grémillet, David, Griffin, Larry R., Harel, Roi, Kane, Adam, Kays, Roland, Kleyheeg, Erik, Lacy, Anne E., LaPoint, Scott, Limiñana, Rubén, López-López, Pascual, Maccarone, Alan D., Mellone, Ugo, Mojica, Elizabeth K., Nathan, Ran, Newman, Scott H., Noonan, Michael J., Oppel, Steffen, Prostor, Mark, Rees, Eileen C., Ropert‐Coudert, Yan, Rösner, Sascha, Sapir, Nir, Schabo, Dana, Schmidt, Matthias, Schulz, Holger, Shariati, Mitra, Shreading, Adam, Silva, João Paulo, Skov, Henrik, Spiegel, Orr, Takekawa, John Y., Teitelbaum, Claire S., van Toor, Mariëlle L., Urios, Vicente, Vidal-Mateo, Javier, Wang, Qiang, Watts, Bryan D., Wikelski, Martin, Wolter, Kerri, Žydelis, Ramūnas, Mueller, Thomas, Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales, Universidad de Alicante. Departamento de Didáctica General y Didácticas Específicas, Tucker, Marlee A., Alexandrou, Olga, Bierregaard Jr., Richard O., Bildstein, Keith L., Böhning‐Gaese, Katrin, Bracis, Chloe, Brzorad, John N., Buechley, Evan R., Cabot, David, Calabrese, Justin M., Carrapato, Carlos, Chiaradia, Andre, Davenport, Lisa C., Davidson, Sarah C., Desholm, Mark, DeSorbo, Christopher R., Domenech, Robert, Enggist, Peter, Fagan, William F., Farwig, Nina, Fiedler, Wolfgang, Fleming, Christen H., Franke, Alastair, Fryxell, John M., García Ripollés, Clara, Grémillet, David, Griffin, Larry R., Harel, Roi, Kane, Adam, Kays, Roland, Kleyheeg, Erik, Lacy, Anne E., LaPoint, Scott, Limiñana, Rubén, López-López, Pascual, Maccarone, Alan D., Mellone, Ugo, Mojica, Elizabeth K., Nathan, Ran, Newman, Scott H., Noonan, Michael J., Oppel, Steffen, Prostor, Mark, Rees, Eileen C., Ropert‐Coudert, Yan, Rösner, Sascha, Sapir, Nir, Schabo, Dana, Schmidt, Matthias, Schulz, Holger, Shariati, Mitra, Shreading, Adam, Silva, João Paulo, Skov, Henrik, Spiegel, Orr, Takekawa, John Y., Teitelbaum, Claire S., van Toor, Mariëlle L., Urios, Vicente, Vidal-Mateo, Javier, Wang, Qiang, Watts, Bryan D., Wikelski, Martin, Wolter, Kerri, Žydelis, Ramūnas, and Mueller, Thomas

Abstract

Aim: Animal movement is an important determinant of individual survival, population dynamics and ecosystem structure and function. Nonetheless, it is still unclear how local movements are related to resource availability and the spatial arrangement of resources. Using resident bird species and migratory bird species outside the migratory period, we examined how the distribution of resources affects the movement patterns of both large terrestrial birds (e.g., raptors, bustards and hornbills) and waterbirds (e.g., cranes, storks, ducks, geese and flamingos). Location: Global. Time period: 2003–2015. Major taxa studied: Birds. Methods: We compiled GPS tracking data for 386 individuals across 36 bird species. We calculated the straight‐line distance between GPS locations of each individual at the 1‐hr and 10‐day time‐scales. For each individual and time‐scale, we calculated the median and 0.95 quantile of displacement. We used linear mixed‐effects models to examine the effect of the spatial arrangement of resources, measured as enhanced vegetation index homogeneity, on avian movements, while accounting for mean resource availability, body mass, diet, flight type, migratory status and taxonomy and spatial autocorrelation. Results: We found a significant effect of resource spatial arrangement at the 1‐hr and 10‐day time‐scales. On average, individual movements were seven times longer in environments with homogeneously distributed resources compared with areas of low resource homogeneity. Contrary to previous work, we found no significant effect of resource availability, diet, flight type, migratory status or body mass on the non‐migratory movements of birds. Main conclusions: We suggest that longer movements in homogeneous environments might reflect the need for different habitat types associated with foraging and reproduction. This highlights the importance of landscape complementarity, where habitat patches within a landscape include a range of different, yet complement

Published
2019

29. Large birds travel farther in homogeneous environments

Author

Tucker, Marlee A., Alexandrou, Olga, Bierregaard Jr., Richard O., Bildstein, Keith L., Böhning‐Gaese, Katrin, Bracis, Chloe, Brzorad, John N., Buechley, Evan R., Cabot, Davi, Calabrese, Justin M., Carrapato, Carlos, Chiaradia, Andre, Davenport, Lisa C., Davidson, Sarah C., Desholm, Mark, DeSorbo, Christopher R., Domenech, Robert, Enggist, Peter, Fagan, William F., Farwig, Nina, Fiedler, Wolfgang, Fleming, Christen H., Franke, Alastair, Fryxell, John M., García‐Ripollés, Clara, Grémillet, David, Griffin, Larry R., Harel, Roi, Kane, Adam, Kays, Roland, Kleyheeg, Erik, Lacy, Anne E., LaPoint, Scott, Limiñana, Rubén, López‐López, Pascual, Maccarone, Alan D., Mellone, Ugo, Mojica, Elizabeth K., Nathan, Ran, Newman, Scott H., Noonan, Michael J., Oppel, Steffen, Prostor, Mark, Rees, Eileen C., Ropert-Coudert, Yan, Rösner, Sascha, Sapir, Nir, Schabo, Dana, Schmidt, Matthias, Schulz, Holger, Shariati, Mitra, Shreading, Adam, Silva, João Paulo, Skov, Henrik, Spiegel, Orr, Takekawa, John Y., Teitelbaum, Claire S., van Toor, Mariëlle L., Urios, Vicente, Vidal‐Mateo, Javier, Wang, Qiang, Watts, Bryan D., Wikelski, Martin, Wolter, Kerri, Žydelis, Ramūnas, Mueller, Thomas, Tucker, Marlee A., Alexandrou, Olga, Bierregaard Jr., Richard O., Bildstein, Keith L., Böhning‐Gaese, Katrin, Bracis, Chloe, Brzorad, John N., Buechley, Evan R., Cabot, Davi, Calabrese, Justin M., Carrapato, Carlos, Chiaradia, Andre, Davenport, Lisa C., Davidson, Sarah C., Desholm, Mark, DeSorbo, Christopher R., Domenech, Robert, Enggist, Peter, Fagan, William F., Farwig, Nina, Fiedler, Wolfgang, Fleming, Christen H., Franke, Alastair, Fryxell, John M., García‐Ripollés, Clara, Grémillet, David, Griffin, Larry R., Harel, Roi, Kane, Adam, Kays, Roland, Kleyheeg, Erik, Lacy, Anne E., LaPoint, Scott, Limiñana, Rubén, López‐López, Pascual, Maccarone, Alan D., Mellone, Ugo, Mojica, Elizabeth K., Nathan, Ran, Newman, Scott H., Noonan, Michael J., Oppel, Steffen, Prostor, Mark, Rees, Eileen C., Ropert-Coudert, Yan, Rösner, Sascha, Sapir, Nir, Schabo, Dana, Schmidt, Matthias, Schulz, Holger, Shariati, Mitra, Shreading, Adam, Silva, João Paulo, Skov, Henrik, Spiegel, Orr, Takekawa, John Y., Teitelbaum, Claire S., van Toor, Mariëlle L., Urios, Vicente, Vidal‐Mateo, Javier, Wang, Qiang, Watts, Bryan D., Wikelski, Martin, Wolter, Kerri, Žydelis, Ramūnas, and Mueller, Thomas

Published
2019
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30. Population growth rates in northern Cape Vulture Gyps coprotheres colonies between 2010 and 2019.

Author

HIRSCHAUER, MARGARET T., WOLTER, KERRI, HOWARD, ALEXANDRA, ROLEK, BRIAN W., and MCCLURE, CHRISTOPHER J. W.

Abstract

Summary: The 'Endangered' Cape Vulture Gyps coprotheres has been monitored across its range for decades through disparate studies varying in geographical scope and length. Yet, no long-term, range-wide survey exists for the species. Coordinated monitoring across the range of the Cape Vulture would be logistically challenging but provide a holistic view of population dynamics in this long-lived species that forages across much of southern Africa. Here, we report breeding pair counts from seven colonies in the Cape Vulture's north-eastern breeding region from 2010 to 2019. We used state-space models to assess population growth across time. Manutsa, Soutpansberg, and Nooitgedacht colonies increased significantly over the study period, with three other colonies having positive estimates of population growth, but 95% credible intervals overlapped zero. The smallest colony at Moletjie is declining toward extirpation; only one breeding pair remained in 2019. Our results suggest the north-eastern population has been stable or increasing since 2010 with our 2019 surveys counting 2,241 breeding pairs across all sites. Indeed, there is an 89% chance that the population across the colonies we monitored increased from 2010 to 2019. Coordinated, range-wide, full-cycle monitoring is needed to thoroughly assess conservation status and efficacy of conservation actions taken for this endangered species. [ABSTRACT FROM AUTHOR]

Published
2021
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31. Home range and habitat selection of captive-bred and rehabilitated cape vultures Gyps coprotheres in southern Africa.

Author

Jobson, Ben, Wolter, Kerri, Jordan, Lara, Monadjem, Ara, and Rowcliffe, J. Marcus

Subjects
*HABITAT selection, *SPATIAL ecology, *VULTURES, *BIRD behavior, *HOMESITES, *PROTECTED areas
Abstract

Following the continual decline of the Cape vulture Gyps coprotheres since the 1960s, captive breeding and rehabilitation programmes have been established to reinforce populations across southern Africa. This study examines the spatial ecology of captive-bred and rehabilitated vultures following release. Our analysis used 253,671 GPS fixes from 20 captive-bred and 13 rehabilitated birds to calculate home range sizes using kernel density estimation. We found that home range size did not differ significantly between captive-bred and rehabilitated birds. The location of home ranges differed: captive-bred birds showed greater site fidelity, remaining close to their release site, whereas rehabilitated birds dispersed more widely across the species' native range. By remaining close to their release site within a protected area, captive-bred birds had a significantly higher per cent of their GPS fixes within protected areas than did rehabilitated birds. Despite fidelity to their release site, captive-bred birds demonstrated innate capabilities for natural foraging behaviours and the same habitat selection strategy as rehabilitated individuals. These findings suggest that captive breeding and reinforcement of populations at declining colonies could provide localized benefits. Future long-term studies should seek to analyse survivorship and identify the breeding behaviour of these captive-bred birds once they reach sexual maturity. [ABSTRACT FROM AUTHOR]

Published
2021
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32. Sexing Cape Vulture Gyps coprotheres based on head morphometrics

Author

Hirschauer, Margaret T, Zimunya, Tapiwa, Wolter, Kerri, and Monadjem, Ara

Subjects
Cape Vulture, head morphometrics, sexual dimorphism
Abstract

The Cape Vulture Gyps coprotheres is considered sexually monomorphic in the literature, but visual differences in head shape between the sexes have been observed. Furthermore, head morphometrics of other Gyps species show statistically significant variation between the sexes. We show that head morphometrics can be used to determine the sex of Cape Vultures. Males generally have wider and shorter heads, and larger bill depths than females. Discriminant function analysis with data from 63 individuals identified the three most predictive variables in sex determination to be head width, head length and bill depth. We also provide an equation that can be used in conjunction with head measurements as a method to determine the sex of Cape Vultures in the field with an overall accuracy of 84% (92% accuracy for females and 72% for males).

Published
2018

34. Large birds travel farther in homogeneous environments

Author

Tucker, Marlee A., primary, Alexandrou, Olga, additional, Bierregaard, Richard O., additional, Bildstein, Keith L., additional, Böhning‐Gaese, Katrin, additional, Bracis, Chloe, additional, Brzorad, John N., additional, Buechley, Evan R., additional, Cabot, David, additional, Calabrese, Justin M., additional, Carrapato, Carlos, additional, Chiaradia, Andre, additional, Davenport, Lisa C., additional, Davidson, Sarah C., additional, Desholm, Mark, additional, DeSorbo, Christopher R., additional, Domenech, Robert, additional, Enggist, Peter, additional, Fagan, William F., additional, Farwig, Nina, additional, Fiedler, Wolfgang, additional, Fleming, Christen H., additional, Franke, Alastair, additional, Fryxell, John M., additional, García‐Ripollés, Clara, additional, Grémillet, David, additional, Griffin, Larry R., additional, Harel, Roi, additional, Kane, Adam, additional, Kays, Roland, additional, Kleyheeg, Erik, additional, Lacy, Anne E., additional, LaPoint, Scott, additional, Limiñana, Rubén, additional, López‐López, Pascual, additional, Maccarone, Alan D., additional, Mellone, Ugo, additional, Mojica, Elizabeth K., additional, Nathan, Ran, additional, Newman, Scott H., additional, Noonan, Michael J., additional, Oppel, Steffen, additional, Prostor, Mark, additional, Rees, Eileen C., additional, Ropert‐Coudert, Yan, additional, Rösner, Sascha, additional, Sapir, Nir, additional, Schabo, Dana, additional, Schmidt, Matthias, additional, Schulz, Holger, additional, Shariati, Mitra, additional, Shreading, Adam, additional, Paulo Silva, João, additional, Skov, Henrik, additional, Spiegel, Orr, additional, Takekawa, John Y., additional, Teitelbaum, Claire S., additional, van Toor, Mariëlle L., additional, Urios, Vicente, additional, Vidal‐Mateo, Javier, additional, Wang, Qiang, additional, Watts, Bryan D., additional, Wikelski, Martin, additional, Wolter, Kerri, additional, Žydelis, Ramūnas, additional, and Mueller, Thomas, additional

Published
2019
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35. Injuries, mortality rates, and release rates of endangered vultures admitted to a rehabilitation center in South Africa.

Author

Howard, Alexandra, Hirschauer, Maggie, Monadjem, Ara, Forbes, Neil, and Wolter, Kerri

Abstract

Many chelonians are admitted to wildlife rehabilitation centers suffering from traumatic shell injury caused by motor vehicle collisions. The incidence and severity of infection as they heal from shell injuries are currently unknown. To determine if there is a correlation between the severity of traumatic shell injury and the severity of infection in turtle patients, total white blood cell counts (WBCs) and white blood cell differentials were measured in common snapping turtles (Chelydra serpentina), painted turtles (Chrysemys picta), a Blanding's turtle (Emydoidea blandingii), and a spotted turtle (Clemmys guttata). WBCs were not significantly different between severity classes; however, WBCs decreased significantly over time for Severity Class III, and basophil counts for all severity classes were significantly different from one another. The data suggest that severity of injury may not be a proper indicator of susceptibility of turtles to infection after shell trauma. Hematology parameters may not be suitable indicators of infection, and the criteria for administering prophylactic antibiotics to turtles with traumatic shell injury remains unknown. [ABSTRACT FROM AUTHOR]

Published
2020

41. A review of vulture wing anatomy and safe propatagial tag application methods, with case studies of injured vultures.

Author

Hirschauer, Margaret T., Wolter, Kerri, and Forbes, Neil A.

Subjects
*WINGS (Anatomy), *VULTURES, *CASE studies
Abstract

Propatagial tags are implemented across the globe in many bird taxa for ornithological research and conservation programs. This marking method is a critical component in research efforts, but evidence suggests they have negative effects on behavior, reproduction, and survival. Several vultures (n=8) in South Africa were recovered with improperly placed propatagial tags between 2010 and 2018, requiring removal of the tags and rehabilitation. We review the critical elements in vulture wing anatomy with photographs of a Cape vulture (Gyps coprotheres) cadaver wing. The only safe placement for propatagial tags lies within a triangular area in the propatagium with dimensions 10 cm x 8 cm x 5 cm. We provide measurement guidelines for tag placement in reference to key points in the wing, as well as photographs and descriptions from case studies of improper (n=5) and proper (n=1) tag placement. We illuminate the importance of understanding wing anatomy and proper tag placement before undertaking this invasive procedure, in aims to reduce the likelihood of tag-related injuries and mortalities in these imperiled species. [ABSTRACT FROM AUTHOR]

Published
2019

48. Natal philopatry in young Cape Vultures Gyps coprotheres.

Author

Hirschauer, Margaret T, Wolter, Kerri, and Neser, Walter

Subjects
*PHILOPATRY, *VULTURES, *BABY birds, *BIRD breeding, *BIRDS
Abstract

In 2010, 14 Cape VultureGyps coprothereschicks were ringed as nestlings on the cliffs at the Skeerpoort Cape Vulture colony in the Magaliesberg mountains, South Africa. Observations made during the 2014 and 2015 breeding colony censuses confirm two individuals returned to the Magaliesberg to breed. One female bred at Skeerpoort while another female settled in the Nooitgedacht colony situated 25 km from her natal nest. Breeding attempts occurred at four years old for both individuals, the youngest on record for wild Cape Vultures. One individual successfully raised a fledgling. [ABSTRACT FROM AUTHOR]

Published
2017
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