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

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  1. martinf

    Crossbills

    You could start with this http://homepage.psy.utexas.edu/Homepage/Group/AnimPersInst/Animal%20Personality%20PDFs/B/Boerner%20&%20Kruger.pdf
  2. martinf

    Crossbills

    Different morphs of Buteo buteo show differing behaviours and they mate assortively (sort of)
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