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

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  1. Birdman7

    House Martins

    Cuckoo Well I suppose if we take this BTO ringed and tracked cuckoo into consideration http://www.bto.org/science/migration/tracking-studies/cuckoo-tracking/england/lyster it took just under 1 month for it to reach Africa on the 2nd August after leaving British Isle shores approx on the 11th...
  2. Birdman7

    House Martins

    Iv seen them in small numbers around my area during the winter, small passage of mixed hirundines mostly Barn, House and Crag Martins been on since January and increasing to bigger numbers lately.
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