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- Rehm, Evan M.; Baldassarre, Guy A.
- Journal of field ornithology 2007 v.78 no.1 pp. 56-63
- Rallus limicola, etc ; Botaurus lentiginosus; Ixobrychus exilis; Podiceps; Podilymbus; geographical variation; marshes; migratory species; monitoring; population dynamics; surveys; temporal variation; water birds; New York; Virginia; Show all 15 Subjects
- ... The decline in populations of several species of marsh birds in North America has prompted development of a monitoring protocol that involves the broadcast of conspecific calls to enhance detection of these secretive species. However, with a standardized protocol, temporal (seasonal) and geographic variation in responses to the broadcast of calls could lead to inadequate monitoring of migratory sp ...