Volume 53(2),December 2006

213.

Bias in avian sampling effort due to human preferences: an analysis with Catalonian birds (1900 - 2002)

Xavier FERRER; Luis M. CARRASCAL; Oscar GORDO; Joan PINO (Pages 213-227).

229.

Sex determination in glossy ibis chicks based on morphological characters

Jordi FIGUEROLA; Luís GARCIA; Andy J. GREEN; Fernando IBAÑEZ; Manuel MAÑEZ; José Luís DEL VALLE; Héctor GARRIDO; José Luís ARROYO; Rubén RODRÍGUEZ (Pages 229-235).

237.

Diet composition and prey choice of the Southern grey shrike Lanius meridionalis L. in South-eastern Spain: the importance of vertebrates in the diet

José A. HÓDAR (Pages 237-249).

251.

Habitat preferences, population size and demographic trends of houbara bustard Chlamydotis undulata in Lanzarote and La Graciosa (Canary Islands)

Luis M. CARRASCAL; Javier SEOANE; David PALOMINO; César Luis ALONSO (Pages 251-269).

271.

Conserving birdlife of Peruvian highland bogs: effects of patch-size and habitat quality on species richness and bird numbers

José Luis TELLERÍA; José Luis VENERO; Tomás SANTOS (Pages 271-283).

285.

Do subspecies of bluethroat Luscinia svecica show a geographic segregation during the autumn migration period in Spain?

Juan ARIZAGA; Daniel ALONSO; Francisco CAMPOS; José M. UNAMUNO; Alberto MONTEAGUDO; Graciela FERNÁNDEZ; Xosé M. CARREGAL; Emilio BARBA (Pages 285-291).

293.

Habitat use and foraging success of roseate and common terns feeding in flocks in the Azores

David MONTICELLI, Jaime A. RAMOS; José PEREIRA (Pages 293-306).

307.

Within-clutch variation in yolk androgens in relation to female expression of a male ornament in pied flycatchers Ficedula hypoleuca

Diego GIL; André LACROIX; Jaime POTTI (Pages 307-315).

317.

Functional analysis of the bowing display of collared pratincoles Glareola pratincola

Ismael GALVÁN (Pages 317-323).

325.

Density and breeding habitat characteristics of an insular population of Barbary falcon Falco peregrinus pelegrinoides (El Hierro, Canary Islands)

Beneharo RODRÍGUEZ; Manuel SIVERIO (Pages 325-331).