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2 results on '"survey efficacy"'

1. Applications of thermal imaging for bird surveys: examples from the field.

Author

Hughes, Morgan, Hopwood, Paul, Dolan, Matilda, and Dolan, Ben

Subjects
*THERMOGRAPHY, *BIRD surveys, *BIRD conservation, *BIRD population estimates, *BIRDHOUSES, *ROOSTING, *THERMAL imaging cameras
Abstract

The West Midlands Ringing Group (WMRG) have been using thermal-imaging equipment since 2016 to locate elusive birds for ringing by night and by day, to survey roosting birds in reedbeds, to monitor nets at night and to check nest boxes for occupancy. The technique has not only transformed the catch rate for ringing surveys of birds such as Skylark Alauda arvensis, Woodcock Scolopax rusticola, Snipe Gallinago gallinago and Jack Snipe Lymnocryptes minimus but also resulted in an increase in survey efficiency, a reduction in disturbance of birds and an improvement in the accuracy of counts for birds of conservation concern. Here we present case studies from WMRG's work and an overview of the advantages, constraints and potential applications for the use of thermal imaging in ornithological surveys. [ABSTRACT FROM AUTHOR]

Published
2021
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2. The skynet, a new method to capture bats over water

Author

Hughes, Morgan, Thomas, Oliver, Suvorova, Anna, Saunders, Tommy, Krajnović, Marija, Jelić, Dušan, Martin, Thomas Edward, and Haelewaters, Danny

Subjects
Chiroptera, Biology and Life Sciences, General Earth and Planetary Sciences, ponds, survey efficacy, mist-netting, fieldwork, General Environmental Science
Abstract

When monitoring bats, the greatest yield in capture rate for survey effort can often be found in riparian and lentic habitats. However, capturing bats over large bodies of water is usually challenging due to the logistics of deploying equipment and extracting bats whilst ensuring the safety of surveyors. We present a novel technique – the “skynet” – as one solution to this problem, allowing fast and safe deployment of a suspended mist net between two anchor points over open water. Preliminary fieldwork in a Croatian scrub-dominated landscape yielded a capture of 22 bats of five species over a 1600 m2 pond. Our results demonstrate that the method is effective compared to a simultaneous net positioning on the bank of the same water body, which yielded no bats. System design and recommendations for bespoke alterations, alternative equipment options, and future investigations are presented here.

Published
2022
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