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

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  1. njlarsen

    Dusky-capped Flycatcher, Arizona

    There are several versions of Sibley, the big book; east and west smaller books; and the app version. I have the latter. The text especially might differ a little between versions. Niels
  2. njlarsen

    Dusky-capped Flycatcher, Arizona

    I am actually leaning the opposite direction. Even without the tail tip, you can still see the dark edge and rufous (or at least brighter if that is part of your color blindness) on most of the tail underside. Sibley directly mentions very little rufous on underside of tail for DcF. I also think...
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