La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Phenology and length of stay of transient and wintering Western Sandpipers at Estero Punta Banda, Mexico
Auteurs :	G. Fernandez, Auteur ; H. de la Cueva, Auteur ; N. Warnock, Auteur
Type de document :	Article
Dans :	Journal of Field Ornithology (72(4) FAL 2001)
Article en page(s) :	509-520
Langues:	Anglais
Résumé :	The Western Sandpiper (Calidris mauri) is one of the most abundant shorebirds in northwestern Mexico however, little is known about its winter ecology ill this area. We, patterns of male Western Sandpipers during the winters of 1995-1996 (1995) and 1996-1997 (1996) at Estero Punta Banda in Baja California, Mexico. We resighted 54 birds in 1995 and 56 birds in 1996, Birds arrived later in 1995 (median 1 December) than in 1996 (median 24 October). The median departure dates (6 March 1996 and 20 February 1997) did not differ between years. We observed two patterns of residency, Wintering birds in 1995 arrived on 17 November (median) and departed on 17 March (,median), with length of stay of 120.0 +/- 4.2 d; and in 1996 arrived on 12 October (median) and departed oil 8 March (median), with length of stay of 146.9 +/- 4.3 d. Transient birds in 1995 arrived on 7 December (median) and departed oil 17 February (median), with stays of 33.7 +/- 4.3 d; and in 1996 arrived on

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