Yellow-legged Gull Larus michahellis
Presumed 4cy (3W), February 10th 2010, Warks
© A. R. Dean
An interesting combination of feather tracts for an individual in February. The wing has apparently second-generation secondaries and greater coverts but third generation primaries (and appears to have small mirrors on p9 and p10). The wings resemble a bird in transition during late summer/autumn from 2S to 3W. Third generation primaries (with small mirrors on both p9 and p10) must indicate age is 4cy and feathers of inner wing presumably 'retarded'. The all-white, adult-like tail also equates with 4cy.
| Laughing |
Ring-billed | Common |
Lesser Black-backed |