Baltz, A. P. & Clark, A. B. 1996: Cere colour as a basis for extra-pair preferences of paired male budgerigars (Melopsittacus undulatus: Psittacidae: Aves). Ethology 102, 109–116.
Cere Colour as a Basis for Extra-pair Preferences of Paired Male Budgerigars (Melopsittacus undulatus: Psittacidae: Aves)
Version of Record online: 26 APR 2010
1996 Blackwell Verlag GmbH
Volume 102, Issue 1, pages 109–116, January-December 1996
How to Cite
Baltz, A. P. and Clark, A. B. (1996), Cere Colour as a Basis for Extra-pair Preferences of Paired Male Budgerigars (Melopsittacus undulatus: Psittacidae: Aves). Ethology, 102: 109–116. doi: 10.1111/j.1439-0310.1996.tb01108.x
- Issue online: 26 APR 2010
- Version of Record online: 26 APR 2010
- Received December 27, 1994; Accepted August 15, 1995 (J. Bmckmann)
Male budgerigars may be limited in the time they have available to pursue extra-pair copulations because of conflicts with other reproductive behaviour. If males could selectively court only immediately fertilizable extra-pair females they should do so. The cere colour of a female budgerigar may be used as a cue to her reproductive readiness. We experimentally tested the hypothesis that males prefer females with dark ceres, which are indicative of developed ovaries, over females with light-coloured ceres, characteristic of birds with undeveloped ovaries. In a pairwise choice experiment between females that had their cere colour artificially manipulated, pair-bonded males were more likely to choose the female with the dark-coloured cere.