Although sexual interactions between species (reproductive interference) have been
reported from a wide range of animal taxa, their potential for determining species …

In studies of cumulative cultural evolution in non-human animals, the focus is most often on
incremental changes that increase the efficacy of an existing form of socially learned …

A new theory of cognitive biases, called error management theory (EMT), proposes that
psychological mechanisms are designed to be predictably biased when the costs of false …

Twenty years ago Pepperberg set out to discover whether large-brained, highly social
parrots were capable of mastering complex cognitive concepts and the rudiments of …

Wolves excitedly greet each other as members of the pack come together; a bumble bee
uses its long tongue to reach the nectar at the base of a foxglove flower; a mongoose swiftly …

In studies of bird song, experimental designs and statistical analyses are often inappropriate
for the hypotheses being tested. Frequently, only one playback or tutor stimulus is used to …

Songs of Darwin's finches were studied on the Galápagos Island of Daphne Major from
1976 to 1995. A single, structurally simple, and unvarying song is sung throughout life by …

The sexual responsiveness of female canaries, Serinus canaria, to six different types of male
song phrases extracted from natural song was tested. Copulation solicitation displays were …

Female birds that do not normally sing possess brain nuclei associated with song production
in males. To determine whether one song nucleus, the caudal nucleus of the ventral …

Male canaries, Serinus canaria, sing a special phrase ('A') that elicits very high levels of
sexual display in conspecific females. This phrase is characterized by the repetition of a …