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

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  1. awiner

    AOU-NACC Proposals 2015

    It's a hypothetical North American record, not a hypothetical species. In the 80's, a Red-backed Hawk was found in Colorado, and mated with a Swainson's Hawk for a few years. It was never accepted as a wild bird. For one source, see...
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