Sunday, January 24, 2010

Prescot reservoirs,

The gull numbers have really dropped down with weather becoming a little warmer of late. Probably a couple of hundred herring gulls on this grey rainy day. A huge argentatus herring gull was interesting . The mantle colour was obviously darker than the nearby argenteus and had a complete sub terminal band on p5 which possibly makes this an argentatus from northern baltic/southern finland area. According to 'Gulls' Olsen and Larsson state this population has more black on p5 covering both webs in 30% of population. This bird has pale eyes although they do look dark in the photos.

Sub terminal band on both webs of p5

A huge bird compared to nearby herrings. Look at the size of the head.

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