Evaluating effects of roadside bias in monitoring marshbird populations in the prairie pothole region

Population size and trends of most North American marsh bird species are poorly known, and continental marsh bird surveys are being proposed to provide better insight into marsh bird populations. The Prairie Pothole Region (PPR) is a critical and expansive breeding area for several focal marsh bird species (Beyersbergen et al. 2004). The study described here supports development of a regional and national monitoring program by furnishing data that can be used to develop models that relate roadside counts of marsh birds in the PPR to counts obtained from off-road sites for which access is more difficult. Roadside surveys (i.e. point-count surveys conducted from the road right-of-way) are being considered as a technique that would allow widespread areas within the PPR to be surveyed during the short crepuscular period during which these species can be detected, and would ease logistical [see Narratives for more information.]

Principal Investigator(s):

Terry L Shaffer

Project Status:

In Progress

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