mercredi, février 18, 2009

Dans la série les ornithologues bourbonnais :François Lovaty

Titre du document / Document title
Des territoires disjoints entre les roitelets huppés Regulus regulus et les roitelets à triple bandeau Regulus ignicapillus se reproduisant dans des îlots continentaux = Goldcrest Regulus regulus and Firecrest Regulus ignicapillus holding separated breeding territories in small continental pockets

Auteur(s) / Author(s)
LOVATY Francois ;
Résumé / Abstract
Small pockets of conifers planted at roads and forestry tracks crossings in tall oak tree forest in the Allier département are generally occupied by either Goldcrest Regulus regulus or Firecrest Regulus ignicapillus. It is very rare to find both species in the same pocket. When cohabitation happens both species' territories are clearly separated. When a male Goldcrest establishes his territory in one conifer pocket he will stop any intrusion by either species, and will even incorporate some Firecrest verses in its song phrases. The Goldcrest, with reduced populations in this forest opposes the commoner species colonisation attempts in order to maintain itself in some conifer pockets.