Sep 21, 2011

Ringing summary for August 2011

A bit delayed, but here are the ringing summary for August. As table shows our focus has been 1Y Mew Gulls, most of these have been caught in Byparken (the city centre of Bergen) and Tveitevannet (a lake in one of the suburbs of Bergen).

Of the 26 1Y Mew Gulls caught the 20th of August weekend 53 percent was read in either Byparken or Tveitevannet a later date. After three weeks (the 12th of September weekend) 35 percent of the birds was still present and after one month (the 17th of September weekend) only 2 percent was present. The ringed birds are leaving the area and others arrive.

Our numbers for August are as follows:
Species1YSub adultAdult
Mew Gull4142
Lesser Blacked-backed Gull100
Herring gull521
Black-headed Gull001

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