Rob Hoeben |
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Black-headed Gull
>> Black-headed Gull W[J5N6]
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Black-headed Gull W[J5N6]
Thus gull was marked as pullus near Ulsrudvann, Oslo, Akershus & Oslo, Norway (59°53'17"N 010°52'04"E) on June 12, 2011. This is 950 km NNE of Leiden. The Leiden observation was the first to be reported in more than 6 years.
Kokmeeuw 7CY
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