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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 - Lake Geneva, Switzerland

    Hello, One month ago, I saw this gull in Lake Geneva, Switzerland. It was a second winter gull, as the tip of the tail was still very black. In this area, the most common species is the YLG. When I saw this one, it immediately looked different to neighboring YLG and for me, looked like a big...
  2. S

    Gulls in Switzerland (again)

    Hello, I observed again gulls in Switzerland this week. I found some interesting individuals. First, two candidates for first winter LBBG: With my current knownledge, I would argue that the first one is in fact a YLG, due to the beak shape, the head shape, and the advanced molt in the...
  3. 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...
  4. 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...
  5. S

    Large vireo - Near Puerto Escondido, Oaxaca, Mexico

    Yes, it seems a plausible option, even if the birds were larger for me (probably a bias due to the presence of small warblers). Difficult to be sure that this is not a Cassin's, even if I did not see some yellow on these birds.
  6. S

    Large vireo - Near Puerto Escondido, Oaxaca, Mexico

    Hello, Yesterday, I have briefly seen 2 or 3 vireos of a large species near Puerto Esocndido, along the Pacific slope of Mexico. I estimated their size to 16-18 cm, but as no vireo reach this size, they should have been a bit smaller. They had a clear eye circle and a strong eyebrow...
  7. S

    Empidonax - Oaxaca, Mexico

    Hello, Thank you for your answer ! I also think that this is a Least. After having looked on the sonograms of different possible species, it also seems to be the closest.
  8. S

    Empidonax - Oaxaca, Mexico

    Hello, It was in a shrub area, with only few trees, very close to a beach. The bird was close to 2 white-lored gnatcatchers and 1 blue-grey gnatcatcher.
  9. S

    Empidonax - Oaxaca, Mexico

    Hello, I saw an empidonax flycatcher near Puerto Escondido, along the Pacific coast of Oaxaca, Mexico. I couldn't note any visual characteristics which could help to identify the bird specifically, but I recorded its call. I also put the sonogram.
  10. S

    Richard's Pipit ?

    Thank you ! Other opinions ?
  11. S

    Richard's Pipit ?

    I saw this bird 4 hours only after a Richard's Pipit was observed. I know that the pictures are very bad, but do you thing that it's really a Richard's Pipit ? Thank you !
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