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

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  1. YuShan

    2 Blue Tit nests

    Nice! Weird that you have two nests. I would have thought that only one would get occupied because these birds are territorial. Perhaps the male has two females? But why flying out of one with a caterpillar and delivering it to the other? Perhaps in one box the eggs haven't hatched yet and...