Anthropogenic noise affects the behavior of a variety of animal taxa around the world. In
many taxa, minimum frequencies of acoustic signals increase with ambient noise levels, and …

Traditional models for female extra‐pair matings assume that females benefit indirectly from
extra‐pair mating behaviour. Under these so‐called adaptive models, extra‐pair males are …

Territorial defence depends on highly interrelated factors such as food abundance and
conspecific density. We used Dupont's Lark Chersophilus duponti as a model species to …

Music is thought to engage its listeners by driving feelings of surprise, tension, and relief
through a dynamic mixture of predictable and unpredictable patterns, a property …

There is growing interest in latitudinal effects on animal behaviour and life history. One
recent focus is on birdsong, which is hypothesized to be more elaborated or complex in the …

Song production across many songbird species is shaped by largely conserved sets of
constraints associated with song control, production, and perception. This chapter …

Vocal communication in songbirds is important for aggressive signaling, such that an honest
signal allows receivers to assess a competitor's qualities. One aspect of song that …

Background Vocal performance refers to the ability to produce vocal signals close to
physical limits. Such motor skills can be used by conspecifics to assess a signaler's …

Sexual signals that are physically limited can be reliable indicators of quality or motivation in
male–male competition. One such example of a motor constraint in birds is the production of …

Duets in pair-bonding primates serve as a primary mode of communication between pairs,
and duets may provide cues to conspecifics regarding the calling individual or pair. Here, we …