Mew Gull Larus canus canus; heinei; kamtschatschensis; brachyrhynchus

(last update: March 12, 2012)

Mew Gull canus SFH CT-106077 3cy, 28 November 1997, Malmö, Sweden.

Figure 20: CT106077 (348/96,1) advanced three-year old (3CY) canus, with mirrors on P8-P10 and sub-terminal black on only 5 primaries. Ringed in 1995 in Finland. 28 November 1997.

Most three-year old birds have two mirrors. But we found one bird (out of 24 proven three-year birds) already showing a small mirror on P8 (see fig 20 below). This bird could not be aged correctly as three-year old without ring-information.

Figure from:
Is it possible to age subadult Mew Gulls Larus canus?
by: Kenneth Bengtsson & Lennarth Blomquist, publication in: Anser 2-42(2003): p 73-92.