A comparison of the biology of the normal and bridled forms of the Guillemot Uria aalge at a single colony

The proportion of Guillemots on the Isle of May showing bridling has remained constant for 49 years. Although clumping of birds occurred, there was no obvious assortment of sexes. We detected no systematic differences in the breeding of bridled and normal individuals.

Bibliographic Details
Published in:Journal of Zoology
Main Authors: Harris, M. P., Wanless, S.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1986
Subjects:
Online Access:http://dx.doi.org/10.1111/j.1469-7998.1986.tb03624.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1986.tb03624.x
https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1986.tb03624.x
https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1986.tb03624.x
Description
Summary:The proportion of Guillemots on the Isle of May showing bridling has remained constant for 49 years. Although clumping of birds occurred, there was no obvious assortment of sexes. We detected no systematic differences in the breeding of bridled and normal individuals.