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

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  1. Richard Klim

    King Island Emu

    Great Egret Nial Moores reported that there are no known cases of mixed pairs in S Korea: www.birdforum.net/showpost.php?p=1598658&postcount=39
  2. Richard Klim

    King Island Emu

    Great Egret The relative sizes of alba vs modesta were discussed on BF a couple of years back, eg: www.birdforum.net/showpost.php?p=1594085&postcount=19 www.birdforum.net/showpost.php?p=1594284&postcount=23 According to various sources, linear dimensions of alba are typically 20-30% greater...
  3. Richard Klim

    King Island Emu

    Other well-known bird species with quite significant size differences between subspecies include Canada Goose Branta [canadensis] canadensis vs Cackling Goose B [c] hutchinsii (albeit now commonly split), and Western Great Egret Ardea [Casmerodius/Egretta] alba alba vs Eastern Great Egret A a...
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