Bird Conservation Region 43

Planicie Costera, Lomeríos y Cañones de Occidente

This BCR extends from eastern Sonora south to coastal Nayarit along the Pacific slope of the Sierra Madre Occidental. Vegetation is mainly thorn scrubland, tropical deciduous forest, and pine and oak forests, crossed by ribbons of riparian vegetation. Mangroves and other wetlands are found near the coast. Cuenca del Río Yaqui is a watershed IBA in southeastern Sonora having a unique combination of tropical and subtropical ravines (barrancas) that supports approximately 275 bird species, including Bare-throated Tiger-Heron, Black-bellied Whistling-Duck, Military Macaw, Whitefronted Parrot, Whiskered Screech-Owl, Northern Pygmy-Owl,Blue-throated and Costa’s Hummingbirds, Strickland’s Woodpecker, Thick-billed Kingbird, Rose-throated Becard, Blackcapped Gnatcatcher, Yellow-green Vireo, and Tropical Parula. Alamos–Río Mayo is an IBA in southeastern Sonora and adjacent Chihuahua that is the northern limit of tropical deciduous forests, with such key species as the Lilac-crowned Parrot. San Juan de Camarones is a western Durango IBA that includes the old-growth pine forest of the highlands and descends along the typical Sierra Madre Occidental Pacific slope gradient of pine, pine-oak, tropical deciduous, and semi-deciduous forests and desert shrublands. Important species in this IBA include the Golden Eagle, Thickbilled Parrot, and Eared Trogon. Southward in coastal Sinaloa lies the Ensenada Pabellones IBA, a large coastal lagoon covered by mangroves and tule that provides winter habitat for the Greater White-fronted Goose and important breeding habitat for Brown Pelican, Osprey, and Magnificent Frigatebird. Bahía Santa María in central Sinaloa is the most important wintering site for Brant on the continental coast of Mexico. Also wintering here are American
White and Brown Pelicans, Green-winged Teal, Northern Pintail, Northern Shoveler, Redhead, Lesser Scaup, Bufflehead, Greater White-fronted Goose, Red-breasted Merganser, and Piping Plover.

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