EXPANSION OF PENDULINE TIT (REMIZ-PENDULINUS) THROUGH MIGRATION AND WINTERING

Citation
F. Valera et al., EXPANSION OF PENDULINE TIT (REMIZ-PENDULINUS) THROUGH MIGRATION AND WINTERING, Journal fur Ornithologie, 134(3), 1993, pp. 273-282
Citations number
33
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Ornithology
Journal title
ISSN journal
0021-8375
Volume
134
Issue
3
Year of publication
1993
Pages
273 - 282
Database
ISI
SICI code
0021-8375(1993)134:3<273:EOPT(T>2.0.ZU;2-M
Abstract
The migration and wintering of Remiz pendulinus in western Europe is u pdated by analyzing the recoveries available in EURING Data Bank until 1990. The settlement of new winter quarters, the origin of the popula tions wintering in the Iberian peninsula and the westward shift in the winter and breeding areas, the latter spreading one season slower tha n the former, are assessed. A process of expansion is suggested based on the association between migration, wintering and the expansion of t he breeding areas; this is supported by the parallelism between the ad vance and creation of new winter quarters and the advance of breeding areas: as juveniles apparently lead the winter expansion wintering far ther than the former generation and as the species keeps returning to previous winter quarters, there is a continuous process of wintering e xpansion. The colonization of new breeding areas (mostly by juveniles) during the spring migration completes the interrelated process. The w intering, a key factor in the process, becomes, then, a hint of future expansion.