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Does the presence of an observer affect a bird's occurrence rate or singing rate during a point count?

Richard L. Hutto, Auteur ; Russell R. Hutto, Auteur

Dans Journal of Field Ornithology (91(2) 2020)

The approach or presence of an observer may affect the behavior of nearby birds, rendering them either more or less detectable than when no observer is present due to a change in singing rates. To test whether there are systematic detection bias[...]

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