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

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  1. jmepler

    Birder's Lifelist - should heard birds be counted?

    That is correct John. You are not required to see the bird at all, just be able to make a positive identification. This can be by sight or sound. It can also be done after the fact, based on photos or audio recordings. The only caveat on photos and recordings is that you have had to make...
  2. jmepler

    Birder's Lifelist - should heard birds be counted?

    The official listing rules of the American Birding Association (ABA) state that in order to be counted: Diagnostic characteristics, sufficient for the recorder to identify it to species, must have been seen and/or heard and/or documented for the bird encountered. To me, the requirement that a...
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