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

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  1. H

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

    Agreed 160 overall is not a lot. However, there are spring and other late winter records of other American passerines in the UK, Iceland and mainland Europe and most of these species are 10X as rarer than Red Eyed Vireos. I am not sure if there are any post December records of Red Eyed Vireos...
  2. H

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

    Both these species have very different patterns as vagrants. I know White Rumped Sandpipers are more common but they seem to have a very strong coastal bias. In the European context White Rumped Sandpipers very rarely turn up at inland sites except 2 last "autumn" in the UK and maybe more -...
  3. H

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

    There are at least 160 accepted records of Red Eyed Vireos in Britain and must be at least another 100 more from Ireland and other European destinations and another 150 from the Azores all in autumn and winter but never a spring or summer record of this species. Not one trapped at a ringing...
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