Microgeographical variation in the call of the male Manx Shearwater Puffinus puffinus
Atlantic seabirds , Volume 1 - Issue 1 p. 17- 26
The calls of male Manx Shearwaters at two separate breeding areas on Bardsey Island, Wales were investigated. There was little difference between calls from the two subcolonies when call characteristics were compared separately, but a discriminant analysis placed 75% of the birds into their correct locality. The recent establishment of one of the subcolonies may be responsible for the call variation, rather than any functional explanation.
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