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  1. Valéry Schollaert

    Belfast, Ireland - Gull ID

    "What are the reasonable possibilities for this gull?" Great Black-backed Gull and Herring Gull are the common large gulls there ; both have large pale area on tertials.
  2. Valéry Schollaert

    Belfast, Ireland - Gull ID

    We can, as well as all other birds, but the concept of "certainty" itself is a philosophical question...
  3. Valéry Schollaert

    Belfast, Ireland - Gull ID

    For me, it is too far to make a positive ID, but I think thik bill and much white is the tertials are good for Great Black-backed Gull ?
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