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

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  1. crispycreme

    Bank Swallows?

    I would say not necessarily, since the BC Martin can have a similar thin line down the breast: http://www.arthurgrosset.com/sabirds/brown-chested%20martin.html Look in particular at pics #2 and #4. However, it seems far more prevalent and noticable on the Bank Swallow than on the martin, so...
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