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Article
Kathryn A. Williams, Auteur ; Peter C. Frederick, Auteur ; Paul S. Kubilis, Auteur ; John C. Simon, AuteurEstimating detection error, as well as the magnitude of other potential survey biases, is essential when sampling efforts play a role in the estimation of population size and management of wildlife populations. We quantified visual biases in aer[...]
Article
Peter C. Frederick, Auteur ; Julie A. Heath, Auteur ; Robert Bennetts, Auteur ; Heinz Hafner, AuteurCounts of nest starts are often used as indicators of the size of avian nesting populations, or of avian productivity. However, the accuracy of single or repeated counts of unmarked nests over time for estimating seasonal numbers of nests may be[...]
Article
Julie A. Heath, Auteur ; Peter C. Frederick, AuteurMany birds undergo bare part color changes during the breeding season. Most investigators have focused on color as a signal of individual quality. An alternative, but not exclusive, function of bare part color may be signaling readiness to breed[...]
