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

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  1. R

    Bank or Tree Swallow - Marin County, California, USA

    Thanks to you all. It seems clear now that it is probably a juvenile Tree Swallow.
  2. R

    Bank or Tree Swallow - Marin County, California, USA

    I saw this swallow (or maybe more than one) at Las Gallinas in Marin County, California, 4 June 2022. At the time I thought it was a Bank Swallow (known to some as a Sand Martin), but now I am wondering if it may have been a juvenile Tree Swallow. Bank Swallow would be unexpected at this...
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