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

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  1. Gentoo

    American Goldfinch -- in California

    So what would you guess it is? Is it a distinctly smaller then normal American Goldfinch that happens to have more green on it than what we should see in an area where Lesser Goldfinches are quite common? The only other Goldfinch, indeed small Carduelis species possible in central California is...
  2. Gentoo

    American Goldfinch -- in California

    Bill color on many Carduelis finches changes during the breeding season often to lighter shades. I can tell you from personal experience that Greenfinches Carduelis chloris develope lighter colored bills in spring. I think the same may be true for Lesser Goldfinches. Also the amount of green...
  3. Gentoo

    American Goldfinch -- in California

    The other bird is a Lesser Goldfinch. Americans are larger than Lessers but slightly smaller than European Goldfinch (just so our European friends can get a bit of an idea). My first impression was that the bird on the left was a Lesser Goldfinch. As Alex Said Pine Grossbeaks are huge for...
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