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raising a baby songbird
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Raising A Baby Songbird

The song in this clade is essentially territorial in that it communicates the identity and whereabouts of an individual to other birds and also signals sexual intentions. It is not to be confused with bird calls which are used for alarms and contact and are especially important in birds that feed or migrate in flocks. While almost all living birds give calls of some sort, well-developed songs are only given by a few lineages outside the songbirds.
Other birds (especially non-passeriforms) sometimes have songs to attract mates or hold territory, but these are usually simple and repetitive, lacking the variety of many oscine songs. The monotonous repetition of the Common Cuckoo or Little Crake can be contrasted with the variety of a Nightingale or Marsh Warbler. On the other hand, although many songbirds have songs which are pleasant to the human ear, this is not invariably the case. Many members of the crow family (Corvidae) communicate with croaks or screeches which sound harsh to humans. Even these, however, have a song of sorts, a softer twitter which is given between courting partners. And even though some parrots (which are not songbirds) can be taught to repeat human speech, vocal mimicry among birds is almost completely restricted to songbirds, some of which (such as the lyrebirds or the aptly-named mockingbirds) excel in imitating the sounds of other birds or even environmental noises.

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