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Influence Of Season And Time Of Day On Marsh Bird Detections, Tyler Harms, Stephen Dinsmore
Influence Of Season And Time Of Day On Marsh Bird Detections, Tyler Harms, Stephen Dinsmore
Tyler Harms
Call-broadcast surveys are frequently used to elicit responses of secretive marsh birds and produce greater detection rates than passive surveys. However, little is known about how detection rates of birds from these surveys differ by season and time of day. We conducted call-broadcast surveys for eight focal species at 56 wetlands throughout Iowa from 15 May–13 June 2010 (early season) and from 15 June–10 July 2010 (late season). Our focal species were Pied-billed Grebe (Podilymbus podiceps), American Bittern (Botaurus lentiginosus), Least Bittern (Ixobrychus exilis), King Rail (Rallus elegans), Virginia Rail (Rallus …