La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Use of recorded vocalizations in winter surveys of Bachman's Sparrows
Auteurs :	J. A. Cox, Auteur ; S. R. Jones, Auteur
Type de document :	Article
Dans :	Journal of Field Ornithology (75(4) FAL 2004)
Article en page(s) :	359-363
Langues:	Anglais
Résumé :	We used a recorded song of the Bachman's Sparrow (Aimophila aestivalis) to determine whether recorded vocalizations improved detection of this secretive species in winter. Surveys were conducted in the Red Hills region of northern Florida and southwestern Georgia under a range of climatic conditions. Bachman's Sparrows responded readily to taped vocalizations and were detected only on surveys where recorded vocalizations were used. A total of 251 individuals (mean = 1.01 per stop) was observed, or approximately 10-15 observations/h. Detections decreased at lower ambient temperatures and also varied among sites, but adequate numbers were observed even when maximum daytime temperatures remained

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