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Studies on the migratory behavior of songbirds are important to inform full annual cycle conservation. We remotely tracked the early fall migratory movements of both juvenile and adult Savannah Sparrows (Passerculus sandwichensis) that were tagged on their natal breeding territories in southwestern Ontario, Canada, where the Motus Wildlife Tracking System has the highest density of automated receivers in North America. Our primary aims were to describe and compare adult and juvenile migratory movements during the early part of migration, compare frequency of detection of juveniles versus adults as a proxy for minimum apparent survival, and describe potential migration routes and overwintering areas. Juveniles initiated migration approximately a month earlier than adults. Both juveniles and adults typically made their first migratory flight in a southwest direction, but some juveniles displayed subsequent exploratory movements that were not in a southwest direction, potentially to collect information for next year's breeding site selection. Detection rates early in migration were similar, but low. for adults and juveniles (34% and 39% respectively), suggesting that juveniles that had survived the fledgling period likely did not experience high mortality during the subsequent 2 months prior to their fall migration. Long-distance detections of 2 adults preliminarily suggest that individuals from this southern Ontario breeding region may travel west of the Appalachian Mountains along the Mississippi flyway during fall migration. Our study aligns with previously reported patterns of age-specific migratory behavior from other Savannah Sparrow populations and contributes to our overall understanding of the migratory ecology of this species. Received 6 April 2021. Accepted 23 September 2022. Key words: fall migration, migration orientation, migration timing, songbird, telemetry. Los estudios de comportamiento de ave migratorias son importames para conocer su ciclo anual completo de conservacion. Monitoreamos de manera remota los movimientos migratorios de otofio temprano tanto de juveniles como de adultos de gorrion Passerculus sandwichensis que fueron marcados en sus territories natales/ reproductivos en el sudoeste de Ontario. Canada, donde el Sistema de Monitoreo de Vida Silvestre Motus tiene la mayor densidad de receptores automaticos de Norteamerica. Nuestros objetivos primarios ilieron describir y comparar los movimientos migratorios de adultos y juveniles durante !a parte inicia! de la migracion. comparar la frecueneia de deteccion de juveniles versus de adultos como proxy de la sobrevivencia aparente minima asi como describir potenciales rutas migratorias y areas de hibernacion. Los juveniles iniciaron la migracion aproximadamente un mes antes que los adultos. Tanto juveniles como adultos tipicamente hicieron su primer vuelo migratorio en direccion sudoeste. aunque algunos juveniles desplegaron movimientos exploratorios posteriores que no eran en direccion sudoeste. posiblemente para coleetar informacion para la seleccion del sitio de reproduccion del afio siguiente. Las tasas de deteccion de migracion temprana rueron similares. aunque bajas. para adultos y juveniles (respectivamente 34% y 39%), lo que sugiere que tos juveniles que sobrevivieron a su etapa de volantones posiblemente no tuvieron una alta mortalidad durante los 2 meses que siguieron a la migracion otonat. La deteccion a larga distancia de 2 adultos sugiere preliminarmente que los individuos de esta region de reproduccion al sur de Ontario podrian viajar al oeste de las Appalachian Mountains a lo largo del rio Mississippi durante la migracion de otono. Nuestro estudio se alinea con patrones previamente reportados de patrones migratorios especificos por edad de otras poblaciones de gorrion Passerculus sandwichensis y contribuyen al entendimiento general de la ecologia migratoria de esta especie. Palabras clave: aves canoras. migracion otonal, orientacion migratoria. telemetria, tiempo migratorio., The miniaturization of archival tracking devices has allowed scientists to directly follow the movements of individual migrating birds to determine their behavior and overwintering areas (McKinnon and Love 2018), leading [...]

Bird–window collisions (BWCs) are a major threat to avian populations, annually causing up to one billion bird deaths in the US alone and untold numbers of fatalities worldwide. Until recently, there has been limited institutional and governmental recognition of this issue and few coordinated, national‐level efforts to address it. To fill this need, citizen‐science campaigns have stepped in to generate scientific information about BWCs, raise public awareness, and advocate for policy and actions to reduce collisions. We review the BWC issue and showcase how citizen‐science programs in multiple countries have achieved these outcomes. Additional citizen‐driven successes in addressing BWCs are possible if key constraints are overcome, including funding limitations and challenges of proactively engaging stakeholders who can reduce BWCs at scale. Addressing this global conservation issue will also require building upon the recent increase in attention to BWCs by government agencies, nongovernmental organizations, commercial entities, and professional scientists. [ABSTRACT FROM AUTHOR]