Brixham Harbour, yesterday

Close examination of photos of yesterday's "adult" glaucous gull shows that while the plumage is adult type, the basal 2/3 of the bill is flesh-coloured and there are traces of a dark band on the lower mandible. Both characters would appear to indicate a 4th winter bird - comments appreciated.

Glaucous gull, 4th winter?
Glaucous gull, 4th winter?

Eds. Adult Glaucous Gulls often have pinkish toned bills in winter, also quite obvious dark bill marks can be shown by much older known age large gulls and presumably also in Glaucous.  Plumage looks to be entirely adult - white tail and underwing with no darker marks on primary covs - so most likely adult, i.e. older than 5th cal year.

Posted February 14th, 2018 at 12:59 pm by Chris Proctor in Bird News