La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Phonotactic responses of Brown Rats (Rattus norvegicus) to begging calls of Starling nestlings (Sturnus vulgaris) (2021)
Auteurs :	Stephen Takács, Auteur ; Gerhard Gries, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (162(4) October, 2021)
Article en page(s) :	1173-1181
Langues:	Anglais
Résumé :	Foraging behavior of Brown Rats (Rattus norvegicus) is commonly thought to be guided by olfactory cues. Here we tested the hypothesis that foraging Brown Rats eavesdrop on bird vocalizations to locate prey. We recorded calls of nestling Starlings (Sturnus vulgaris) with microphones sensitive in the sonic and ultrasonic range, respectively, and compiled clear begging calls into a single sound file (2-min long) which included the entire recorded sound range (0–100 kHz; Audio File 1). Sound analyses revealed a fundamental two-tone modulated sound centered around 3 kHz, a first and second harmonic at, respectively, 9 and 16 kHz, and bands of ultrasonic frequency components at 20, 25, and 37 kHz. We subjected Audio File 1 to low- and highpass-filtering, thereby producing a sonic-range only file (
En ligne :	https://doi.org/10.1007/s10336-021-01895-9

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