Virtually nothing is known about natal dispersal distances of the introduced Egyptian Goose in Europe. In this paper we document two records of long-distance natal dispersal obtained in DBCB. The first record concerns a male born in Arnhem, The Netherlands (51°59’N, 05°54’E), in March DBBK, that bred successfully in Essen-Borbeck, Germany (51°28’N, 06°56’E), 92 km to the south-east, in 2010(Fig. 1) and in 2011. The second record is a male born in Jever, Germany (53°35’N, 07°54’E), in the spring of 2009. The bird was paired with a female that was recorded breeding between 17 June and 12 July 2010 in Groningen, The Netherlands (53°14’N, 06°34’E), 96 km to the west-southwest (Fig. 2). Both breeding records were new settlements, and they fit with a theoretical model proposed by Lensink (1998) that indicated that new settlements can occur at distances of up to 100-200 km. Other ring-recoveries emphasize that movements of 50-150 km are not uncommon for birds of the continental population, as opposed to British birds.
All in all, the data suggest that the continental breeding birds currently form a free-mixing population.
Klaas van Dijk & Frank Majoor
Jaar van uitgave:
Sovon & NOU