Larus cachinnans

(last update: February 16, 2013)

Greg Neubauer
Marcin Przymencki
Albert de Jong
Mars Muusse


cachinnans plumages

Larus argentatus argentatus 8CY CE950 April 12 2008, Tara dump - Tampere, Finalnd. Foto: Hannu Koskinen.

8CY argentatus, ringed white CE950 as pullus on July 04 2001 in Vilppu, Finland (62.15N 24.05E). Bird with obvious yellow legs. This represents a potential cachinnans-trap for the unwary. Baltic Herrings commonly have a complete black band across P5, a long white tip to P10, yellowy legs and a reddish orbital ring; its bill is rather slender-based and its upperparts are a good match for cachinnans. However, the head retains the typical bulk of Herring Gull, its iris is unmarked yellow, and the bill has a rather sharply curved culmen and a marked gonydeal angle. Note red bleeding onto the upper mandible, a common phenomenon in michahellis.