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Nest and breeding population abundance of Least Terns: assessing bias and variation in survey timing and methods

Matthew D. Hillman, Auteur ; Sarah M. Karpanty, Auteur ; James D. Fraser, Auteur

Dans Journal of Field Ornithology (84(3) SEP 2013)

Methods commonly used to estimate the number of nests and size of the breeding population at colonies of Least Terns (Sternula antillarum) and other waterbirds include walk-through counts of nests (ground-nest counts) and counts of incubating ad[...]

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