In many birds, including the sparrow, song dialects are learned from parents and neighbors.
As a result of these and other processes Cowbirds reliably transmit not only species-typical song, but also the regional song dialects typical of birds that acquire their songs as a result of exposure to parental song.
Although there are local song dialects that differ in the number of song syllables [20], pair members in all areas studied have an identical song, which is mostly uttered in unison [16], [17].
The two mangrove finch populations are geographically separated by 70 km of barren lava desert and volcanic mountain, which is likely to have promoted the cultural evolution of different local song dialects.
This raises the possibility that dialects are the derived condition (and that the systems of song dialects that exist in some of the North American Zonotrichia are independently derived).
However, attempts are being made by some writers and radio presenters to revitalise its use and the distinctive sing-song accent and many dialect words of Norse origin remain in use.
Many YouTube viewers are annoyed, with some fans recording their own versions of the songs in dialect.
Nothing escapes Hugo's omnivorous collage, not the argot of the criminal underworld, nor songs in dialect, nor the scraps of paper scribbled with revolutionary notes which Hugo loves quoting - incomprehensible fragments, like imported nonsense poems.
During the show — which is based on interviews with Scottish soldiers but which includes plangent songs in dialect, and incorporates something approaching ballet in the representation of a fistfight — there was also loud laughter from certain quarters at the play's linguistic vérité.
More recently, investigations across different species have revealed astonishing complexity in the communication calls used by bats including vocal dialects, group foraging calls, distress calls, courtship and territorial songs [ 8– 12].
