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

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  1. djleahy

    Elkhorn Slough, California

    Thanks for the quick replies! I'm glad it's as clear as I was thinking. Regarding the field mark, Sibley writes "All plumages show distinctive pale translucent crescent across outer primaries (by the most important field mark to watch for on a flying bird)." Peterson draws pictures that...
  2. djleahy

    Elkhorn Slough, California

    Hi folks, I snapped this guy fairly high overhead. Looks like a solid red-shouldered hawk to me. However, I had been watching some northern harriers just previously, and looking at Sibley's, it seems like a juvenile harrier would look similar. I think the buteo-esqueness shows here, but I...
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