La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	When do the young mature? An examination of the family stability of neck-banded White-fronted Geese Anser alb. albifrons.
Auteurs :	Helmut Kruckenberg, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (126(3) 2005)
Article en page(s) :	253-258
Résumé :	We investigated the period of time colour-marked juveniles spent with the parental European White-fronted Geese. The families stayed together as units, sometimes Lip to the 2(nd) or 3(rd) winter. First familiy bonds started separating from each other in January at the earliest. The majority I followed by February and March. The results found in other subspecies (a longer period of close family ties over many years) could also be confirmed. Family members migrate together long into the spring migration season. As described in Greenland and Greater White-fronteds we found family stability in White-fronteds over more than one migration season. 7% of the young born in 1999 and 29% born in 2000 were seen with their parents in the second winter, 4% of the young from 1999 were seen with one of the parents in the third winter. After the loss of one parental bird the young were seen several times with the mother goose, but never with a father gander.

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