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

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    Birding before field guides

    Bruun and Singer also wrote a European guide, (The Hamlyn guide) which predates Heizel, Fitter and Parslow (the original Collins guide). It had the advantage over Peterson that the pictures were opposite the text but the Peterson plates were better. It was later reissued with new text (by...
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