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Complex female vocal behaviour of great and blue tits inside the nesting cavity Leen Gorissen 1) & Marcel Eens (Department of Biology, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium) (Accepted: 25 February 2005) Summary Up to now, little is known about female vocal behaviour and about vocal communication be- tween male and female songbirds in the northern temperate zone. However, raising a brood together requires successful communication between both members of a pair. By placing small microphones inside the nesting cavity of great and blue tits, we were able to record sev- eral novel female sounds that have not been described previously. These recordings also pro- vided evidence of vocal interactions between the female inside and the male outside the nest hole. Females produced on average 2.7 different vocalisation categories during each record- ing session, ranging from one to seven. With only one exception, all females used the same vocalisation type when vocally interacting with their mate. The acoustical properties of these sounds suggest that they are designed for short range communication and sonographic repre- sentation revealed remarkable similarities in the vocal signals of blue and great tit females. We discuss the possible functions and selection pressures shaping
Behaviour – Brill
Published: Jan 1, 2005
Keywords: INTERACTIVE COMMUNICATION; FEMALE VOCALISATIONS; CLOSE RANGE COMMUNICATION; RECORDINGS INSIDE NEST BOX
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