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

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  1. kb57

    Do theories regarding the mechanisms for Vagrancy stand scrutiny, and what does vagrancy tell us about migration?

    The UK Northern Mockingbird a couple of years ago was interesting...I remember someone on BF (sorry, can't remember who) correctly predicting it might follow the coast northwards, thinking it was on the east coast of America...which it duly did, turning up eventually in Northumberland.