Psychology, Department of

 

Date of this Version

2003

Comments

Published in The Auk 120(1):69–74, 2003. Copyright 2003 American Ornithological Union.

Abstract

Bright-rumped Attilas (Attila spadiceus) have two song forms, one sung primarily at dawn, the other primarily during the rest of the day. Both songs consist of a main phrase and an optional terminal phrase. Our recordings of dawn and day songs in Costa Rica were very similar to those made elsewhere in Central America. However, Central American dawn songs were significantly different than dawn songs from South America, both in terms of quantitative features (temporal and frequency variables) and qualitative characteristics (note shape). Day songs from Central and South America were similar. Song differences suggest that the Bright-rumped Attila may be two species, one in Central America, the other in South America.

Attila spadiceus tiene dos tipos de canto, uno emitido principalmente al amanecer y otro emitido durante el resto del día. Ambos cantos consisten de una frase principal y una frase terminal opcional. Nuestras grabaciones de cantos del amanecer y el día fueron muy similares a otros hechos en otros lugares de Centro América. Sin embargo, los cantos del amanecer centroamericanos fueron signifi cativamente diferentes de los suramericanos, en términos de caracteres tanto cuantitativos (variables de tiempo y frecuencia) como cualitativos (forma de las notas). Los cantos del día de Centro y Sur América fueron similares. Las diferencias en el canto sugieren que A. spadiceus podría comprender dos especies, una centroamericana y una suramericana.

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