Song type matching as threat: a test using interactive playback

Article Abstract:

Recorded songs from sparrows are played back to subject neighbour sparrows in order to determine the response to song-type. Foreign songs, matching song type, and a song from the same repertoire are compared for eliciting an aggressive response. Graphs of song type, aggression scores, and song type switching accompany the article.

Washington, Statistical Data Included, Telecommunications systems, Sparrows, Washington, University of

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Changing territories, changing tunes: male loons, Gavia immer, change their vocalizations when they change territories

Article Abstract:

The changing of yodels or individual vocalizations by male loons (Gavia immer) after shifting to a new habitat is discussed.

Loons, Animal vocalizations, Animal vocalization

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Neighbourustranger discrimination in the little owl, Athene noctua

Article Abstract:

Territorial behavior of little owls with regard to neighbor-stranger differentiation is examined.

Owls

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