While research involving nest searching is important to elucidate estimates of reproductive success and population sustainability, the intensity of effort required to accurately estimate nesting density and reproduction impedes many studies from measuring these factors.
In collaboration with James Madison University (JMU xlabs https://jmuxlabs.org/about/) and the Smithsonian’s Movement of Life Initiative, VWL is undertaking a project to develop methods using small unmanned aircraft systems (sUAS), or drones, to accurately locate active bird nests in grassland ecosystems. These drones, equipped with thermal and RGB cameras, use thermal technology to detect nests from a safe distance above grassland habitats during nesting season, and could potentially eliminate the need for human surveyors. A pilot study has been successfully executed and will continue through 2020. The goals of this study are to 1) validate the precision of nest searching in working grasslands using drones; 2) identify how vegetation density/structure impacts sUAS survey accuracy; and 3) compare behavioral responses of birds to nest searches conducted by sUAS vs. trained surveyors.
If these drones can demonstrate the precision and accuracy required to identify grassland nests, and possess practical utility, in terms of battery longevity and ease of use, then this tool could be used in place of trained surveyors to locate nests of threatened and endangered grassland species.
Amy Johnson – Virginia Working Landscapes
Jared Stabach – Smithsonian’s Movement of Life Initiative
Project Timeline & Status:
Field work began Spring 2018 – Ongoing
This project is supported by the Smithsonian Women’s Committee
IN THE NEWS:
All Atwitter About Drones
Askins, R.A., Chavez-Ramirez, F., Dale, B.C., Haas, C.A., Herkert, J.R., Knopf, F.L., Vickery, P.D., 2007. Conservation of grassland birds in North America: Understanding ecological processes in different regions. Auk 124, 1–46.
Brennan, L.A., Kuvlesky, W.P., Morrison, 2005. Invited paper: north american grassland birds: an unfolding conservation crisis? J. Wildl. Manag. 69, 1–13. https://doi.org/10.2193/0022-541X(2005)069<0001:NAGBAU>2.0.CO;2
Israel, M., Reinhard, A., 2017. Detecting nests of lapwing birds with the aid of a small unmanned aerial vehicle with thermal camera, in: Unmanned Aircraft Systems (ICUAS), 2017 International Conference On. IEEE, pp. 1199–1207.
Major, R.E., 1990. The effect of human observers on the intensity of nest predation. Ibis 132, 608–612.
Smallwood, K.S., 2001. Linking habitat restoration to meaningful units of animal demography. Restor. Ecol. 9, 253–261.
Stander, R., Lawson, D., n.d. Doug Howell, Waterfowl Biologist North Carolina Wildlife Resources Commission Wildlife Management Division Surveys and Research Program.
Winter, M., Hawks, S.E., Shaffer, J.A., Johnson, D.H., 2003. Guidelines for finding nests of passerine birds in tallgrass prairie. USGS North. Prairie Wildl. Res. Cent. 160.
VWL is supported 100% by grants and donations and our work is made possible by the generous contributions from our community.
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