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Media type:
E-Article
Title:
Late Territorial Behaviour of Willow Warblers Phylloscopus trochilus
Contributor:
Lawn, M. R.
imprint:
Munksgaard International, 1994
Published in:Journal of Avian Biology
Language:
English
ISSN:
0908-8857;
1600-048X
Origination:
Footnote:
Description:
<p>Most male Willow Warblers at a site in southern England established territories during April or early May, shortly after their arrival. A smaller number of territorial males arrived from late May to early July, but none attempted breeding. There was no evidence of non-territorial 'floating' males during the breeding season, and observations of previously ringed birds indicated that some of the late arrivals had already held territories elsewhere in the same year. Most of these birds were thought to be from poorer quality habitats; their occupation of a 'late territory' in a high quality habitat may help them to establish a breeding territory there in the following year. The site fidelity of late territorial males did not differ significantly from that of males holding primary territories at the same site.</p>