Animals use acoustic signals for communication, implying that the properties of these
signals can be under strong selection. The acoustic adaptation hypothesis predicts that …

A fundamental assumption in bioacoustics is that large animals tend to produce
vocalizations with lower frequencies than small animals. This inverse relationship between …

Many seabird species breed in colonies counting up to hundreds of thousands of
individuals. Life in such crowded colonies might require special coding–decoding systems …

Almost all animals exploit vocal signals for a range of ecologically motivated purposes:
detecting predators/prey and marking territory, expressing emotions, establishing social …

Interactive communication occurs when two or more individuals reciprocally exchange
signals. It is widespread and common in humans, non-human animals, and even machines …

The study of animal acoustic signals is a central tool for many fields in ecology and
evolution, but the diversity of analytical methods and sources of animal sound recordings …

Understanding physiological and environmental determinants of strategies of reproductive
allocation is a pivotal aim in biology. Because of their high metabolic cost, properties of …

Perceived vocal attractiveness and measured sex-dimorphic vocal parameters are both
associated with underlying individual qualities. Research tends to focus on speech but …

Songs in passerine birds are important for territory defense and mating. Speciation rates in
oscine passerines are so high, due to cultural evolution, that this bird lineage makes up half …

Highlights•Size-pitch allometry is little studied in songbirds.•We revealed size-pitch allometry
in songs of a small songbird: the willow warbler.•Bigger males (tarsus as proxy for body size) …