Promoting observation, free range exploration, sense of place and citizen science, through the field notes of a naturalist.

Sunday, 9 September 2012

Same species different bird?

Another quick visit to Tredegar House Lake produced another adult winter Mediterranean gull. I had considered this bird to be the same individual as the one recorded on Sunday 2nd September, but on closer inspection I have my doubts.

2nd September adult winter Mediterranean gull

8th September adult winter Mediterranean gull

The most notable difference between the two birds is the absence of a discernable primary projection in the 8th September bird. Further differences, albeit vague, can be seen in the extent black around the eyes and ear coverts. The bill markings are also appear more defined.  

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