La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Winter abundance of shorebirds on Humboldt Bay, California, USA (2019)
Auteurs :	Mark A. Colwell, Auteur ; Elizabeth J. Feucht, Auteur ; Chelsea Polevy, Auteur
Type de document :	Article
Dans :	Wader Study (126(2) August, 2019)
Article en page(s) :	116-124
Résumé :	Estimates of population size are the foundation of conservation actions; they facilitate identification of important habitats and provide evidence of population growth. We conducted four high-tide, winter (4 Nov 2018-17 Feb 2019) surveys of Humboldt Bay, California, a site of Hemispheric importance under the Western Hemisphere Shorebird Reserve Network (WHSRN), to provide estimates of shorebird abundance. Observers detected 25 species totaling approximately 42,500-72,500 individuals. Five species that foraged on expansive unconsolidated sediments of tidal flats dominated the assemblage (Dunlin Calidris alpina, 40%; Western Sandpiper C. mauri, 26%; Least Sandpiper C. minutilla, 13%; Marbled Godwit Limosa fedoa, 11%); by contrast, species frequenting rocky intertidal habitats or ocean-fronting beaches comprised

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