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Article
White-tailed Hawks (Geranoaetus albicaudatus) replace their remiges and rectrices in the usual accipitrid fashion. Rectrices are replaced beginning with R1, then usually R2, R3, R4, R6, and R5 last, but with some variation. However, during a nea[...]
Article
ABSTRACT Harris's Hawks (Parabuteo unicinctus) are cooperative breeders, and groups of more than a pair have been reported from Arizona (49% to 83%) and New Mexico (51%). However, two studies (Griffin 1976, Brannon 1980) suggested that they bree[...]
Article
Article
William S. Clark, Auteur
Article
Francisco Voeroes Dénes, Auteur ; Luís Fábio Silveira, Auteur ; Sergio Seipke, Auteur ; Russell Thorstrom, Auteur ; William S. Clark, Auteur ; Jean-Marc Thiollay, Auteur
