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Article
J. Rodríguez-Ruiz, Auteur ; D. Parejo, Auteur ; J. de la Puente, Auteur ; F. Valera, Auteur ; M. A. Calero-Torralbo, Auteur ; A. Bermejo, Auteur ; I. Catry, Auteur ; J. M. Avilés, AuteurTracking devices have contributed enormously to our knowledge of avian migration, although their effects on birds are controversial. Here, we study the short- and long-term effects of deploying geolocators on European Rollers Coracias garrulus a[...]
Article
D. Parejo, Auteur ; J. M. Sanchez-Guzman, Auteur ; J. M. Avilés, Auteur
Article
Breeding biology of the Roller Coracias garrulus in farming areas of the southwest Iberian Peninsula
J. M. Avilés, Auteur ; J. M. Sanchez, Auteur ; A. Sanchez, Auteur ; D. Parejo, AuteurWe studied the breeding biology of Rollers nesting in nestboxes installed in farming areas of Extremadura (southwest Spain). Laying dates of Rollers in Extremadura are the earliest in the Palearctic region. Clutch size was larger than in norther[...]
Article
D. Parejo, Auteur ; J. M. Sanchez, Auteur ; J. M. Avilés, AuteurThe breeding biology of the Little Egret was studied during two seasons in three inland mixed heronries in the south west of Spain in relation to nest height and density. In addition, we compared the reproductive parameters with those found by o[...]
Article
J. M. Avilés, AuteurThe Iberian azure-winged magpie Cyanopica cyanus shows a remarkable ability to discriminate against great spotted cuckoo Clamator glandarius eggs. Here, I studied whether egg recognition in this species could be a derived feature resulting from [...]
Article
J. M. Avilés, Auteur ; D. Parejo, AuteurThere are no previous studies supporting the link between the decline of Roller Coracias garrulus populations in the Palaearctic and agricultural intensification. We studied the effect of farming practices on Roller reproduction during 1988-1991[...]
Article
J. M. Avilés, Auteur ; J. M. Sanchez, Auteur ; D. Parejo, AuteurNest-site selection and breeding success was studied in a breeding population of Roller (Coracias garrulus) in the Southwest of Spain. 567 nest-boxes were installed on electric pylons in seven different habitats: fallow land, cereals, helm oaks,[...]
Article
J. M. Sanchez Guzman, Auteur ; J. M. Avilés, Auteur ; F. J. Medina, Auteur ; A. Sanchez, AuteurThe evolution of 40 wintering areas of Grus grus in the south-west of the Iberian Peninsula has been studied, including the traditional wintering places of this species on its western route. Eight of these areas harboured 50% of the whole popula[...]
