Browsing Leonard, Marty by Author "Horn, Andrew G."

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  • Observer Effects and Avian-Call-Count Survey Quality: Rare-Species Biases and Overconfidence 

    Farmer, Robert G., Marty L. Leonard, and Andrew G. Horn. 2012. "Observer Effects and Avian-Call-Count Survey Quality: Rare-Species Biases and Overconfidence." Auk 129(1): 76-86.
    Wildlife monitoring surveys are prone to nondetection errors and false positives. To determine factors that affect the incidence of these errors, we built an Internet-based survey that simulated avian point counts, and ...

  • Spatiotemporal Patterns in Nest Box Occupancy by Tree Swallows Across North America 

    Shutler, Dave, David J. T. Hussell, D. R. Norris, David W. Winkler, et al. 2012. "Spatiotemporal Patterns in Nest Box Occupancy by Tree Swallows Across North America." Avian Conservation and Ecology 7(1): 3-3.
    Data from the North American Breeding Bird Survey (BBS) suggest that populations of aerial insectivorous birds are declining, particularly in northeastern regions of the continent, and particularly since the mid-1980s. ...