Monday, 9 April 2012

Putative hybrid Glaucous x Herring Gull - Preston Docks - 9th April 2012






Very interesting bird found by Lee Harrison at Preston Docks. Overall structure appeared right for Glaucous with short primary projecting giving a stumpy appearance, very large, barrel chested size gave the bird a brutish appearance. Rather Herring like head and two toned bill showing a pale tip. Dusky underwings and dusky breast extending to the belly and on the back of the nape. Very pale tertials with only a few gingery markings. Primaries looked similar to a kumlien's gull with gingery leading edge and pale trailing. Mature feathering was coming through on the mantle showing surprisingly dark tones which was much darker than the surrounding argenteus Herring's suggesting argentatus influence. Weak secondary bar showing gingery tone that only partially stood out in flight. Reasonably obvious tail band which contrasted to pale rump. Finally the bird showed long pink legs.

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