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Article
C. A. Martin, Auteur ; J. C. Alonso, Auteur ; J. A. Alonso, Auteur ; M. B. Morales, Auteur ; C. Pitra, AuteurAdult Great Bastards Otis tarda are sexually dimorphic, males weighing more than twice as much as females. However, there is no practical way to distinguish sex in chicks by their morphology. In this paper we describe a discriminant function, Ta[...]
Article
J. A. Alonso, Auteur ; J. C. Alonso, AuteurDans Aquila (93-94 1987)
Article
J. C. Alonso, Auteur ; L. M. Bautista, Auteur ; J. A. Alonso, AuteurWe describe winter territoriality in common cranes, Gras grus, a long-lived migrant species with long-lasting pair bonds and parental care extending throughout the winter. Cranes are territorial in the breeding season, and usually gregarious dur[...]
Article
J. A. Alonso, Auteur ; C. A. Martin, Auteur ; J. C. Alonso, Auteur ; M. B. Morales, Auteur ; S. J. Lane, AuteurA sample of 22 radio-tagged male Great Bustards from central Iberian populations was studied from 1996 to 1998. All birds undertook seasonal movements to postbreeding areas located up to 167 km away from their leks. Departures from leks occurred[...]
