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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. S

    Gull in Switzerland

    Hello, Thank you for your fast answer. Yes, after analyzing it, I also find that the wing pattern in very close to this of a typical Caspian. The only argument against a pure Caspian would thus be the weak primary projection. But maybe it is only an impression due to the position of the bird...
  2. S

    Gull in Switzerland

    Hello, I saw this gull in Switzerland (Lake Zurich) in a place where the dominant species was the Yellow-legged gull, but with also Caspian and Herring gulls and one GBBG. In the field I thought it was a Caspian, because it seemed different from the LLG and similar to an adult Caspian gull...
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