| Titre : | Evolution of nocturnal flight calls in migrating wood-warblers: apparent lack of morphological constraints |
| Auteurs : | Andrew Farnsworth, Auteur ; Irby J. Lovette, Auteur |
| Type de document : | Article |
| Dans : | Journal of Avian Biology (36(4) JUL 2005) |
| Article en page(s) : | 337-347 |
| Langues: | Anglais |
| Résumé : | Many migratory songbirds produce flight calls that vary, sometimes strikingly, among species in duration, frequency, modulation, and pattern, and little is known about what factors are responsible for this variation. Negative correlations between body mass or bill length and song frequencies are well documented in birds, but no studies have examined these associations for flight calls. We explored relationships between flight call and song frequencies and body mass or bill length in |



