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Full-Text Articles in Ornithology
Mapping Bald Eagle Activity Shadows Around Communal Roosts, B. D. Watts, Courtney Turrin
Mapping Bald Eagle Activity Shadows Around Communal Roosts, B. D. Watts, Courtney Turrin
Arts & Sciences Articles
We assessed diurnal activity patterns associated with communal roosts (n = 26) by tracking nonbreeding bald eagles (Haliaeetus leucocephalus; n = 58) within the upper Chesapeake Bay, USA, 2008-2013. We used daytime locations (n = 54,165) to map activity shadows (using home range analytics, 90% kernel) around communal roosts, to evaluate the spatial structure and to delineate diurnal activity centers. We overlaid a range (100-3,200 m) of buffers around the perimeter of each roost to estimate the benefits of management scenarios in extending protection to daytime activities. Activity shadows around roosts varied from 1.5 km(2) to 116 km(2) ((x) over …