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

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  1. Michael Frankis

    Steve Messick's Colorado gull

    Hi Spud, That was one of my early suggestions to consider, when Steve first posted his photo as a Lesser Black-back. Never seen Yellow-footed, but as far as I can tell it should have far broader white tertial tips, and like LBB, much brighter chrome-yellow legs. Even if it does turn out to be...
  2. Michael Frankis

    Steve Messick's Colorado gull

    Hi Steve, Congratulations on a brilliant State First find! Michael
  3. Michael Frankis

    Steve Messick's Colorado gull

    Ji Joern, They may not yet have formally listed the split (that SA website seems partly to suggest they have, partly to suggest they haven't yet!), but even if still just subspecies, the differences are still there on the birds! Michael
  4. Michael Frankis

    Steve Messick's Colorado gull

    Here's a huge blow-up of the legs on one of Steve's photos. Not the best way of doing things it's true, but it looks like there's green tones in there Michael
  5. Michael Frankis

    Steve Messick's Colorado gull

    Hi Spud, Don't think anyone's saying you did! This has just been posted by Dick Newell on surfbirdnews:
  6. Michael Frankis

    Steve Messick's Colorado gull

    Hi Joern, Your first link is to 'Cape Gull', now treated by the South Africans as a distinct species L. vetula. But their website also has a page with an even better heavy-billed true Kelp Gull L. dominicanus - scroll half way down at: http://web.uct.ac.za/depts/stats/adu/species/sp312_05.htm...
  7. Michael Frankis

    Steve Messick's Colorado gull

    Hi Joern, I'd agree, since as far as I know moult is determined by hormonal changes linked to daylength. It might take a year or two for a southern hemisphere-bred vagrant to adapt, and a northern hemisphere bred individual will have northern hemisphere moults from birth. Sibley (N American Bird...
  8. Michael Frankis

    Steve Messick's Colorado gull

    Steve's just posted a second pic of it: http://www.birdforum.net/pp_gallery/showphoto.php?photo=11054 Looking like Kelp Gull. Michael
  9. Michael Frankis

    Steve Messick's Colorado gull

    Anyone any thoughts on the identity of this gull: http://www.birdforum.net/pp_gallery/showphoto.php?photo=11039 I can't identify it. Michael
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