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

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  1. timmyjones

    Yorkshire Redpolls

    Doc have you got the Nils Van Duivendijk Advanced ID guide to the Western Palearctic? If not heres a scan of the Coues' Arctic Redpoll section in it. As you can see there are many more features to Coues' than rump/UTC/flank-streaking/overall colour. Thought it might be useful.
  2. timmyjones

    Yorkshire Redpolls

    Good guesses guys, these birds are 1. Common/Mealy (flammea) 2. Hoary/Arctic (hornemanni) 3. Greenland/Icelandic (rostrata) 4. Hoary/Arctic (exillipes) 5. Common/Mealy (flammea) 6. Common/Mealy (flammea) 7. Common/Mealy (flammea) Original article and photo here...
  3. timmyjones

    Yorkshire Redpolls

    Heres one to test you, there are 4 sub species and 2 Species here. Which birds are which?! http://www.sibleyguides.com/wp-content/uploads/Redpoll_medley_01.jpg
  4. timmyjones

    Yorkshire Redpolls

    Keep going Doc and I'm sure you'll get one soon, maybe try at taking some field sketches and notes, just as valuable as a photo
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