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- Title
Southern Lapwing Vanellus chilensis cooperative helpers at nests are older siblings.
- Authors
Cerboncini, Ricardo A. S.; Braga, Talita V.; Roper, James J.; Passos, Fernando C.
- Abstract
Cooperative breeding is rare in shorebirds, and when found it is thought to be due to polygamous mating (cooperative polygamy). Here we describe the social structure of cooperatively breeding groups in Southern Lapwing Vanellus chilensis and test the prediction that offspring sex ratio is skewed towards the sex that helps. The social groups consisted of a breeding pair with one or two young (mostly males, 68%) from the previous breeding season, and offspring sex ratio was not skewed. Cooperative breeding in the Southern Lapwing is not the consequence of cooperative polygamy, but rather groups were formed by a mated pair and some of their offspring from previous nests as helpers.
- Subjects
BIRD breeding; LAPWINGS; SOCIAL groups; NESTS; SEX ratio; SIBLINGS
- Publication
Ibis, 2020, Vol 162, Issue 1, p227
- ISSN
0019-1019
- Publication type
Article
- DOI
10.1111/ibi.12758