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

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  1. Rasmus Boegh

    Another 5 from Itatiaia Brazil

    Post #4: 1-3 Andrew got it with Pallid Spinetail, 4 Thrush-like (aka Plain-winged) Woodcreeper, 5 Olive-green Tanager (too much contrast between upperparts and underparts in van Berlo). Post #8: You already got them. Even without the back, it is reasonably easy to exclude White-throated from...
  2. Rasmus Boegh

    5 more from Mostardas, Brazil

    Andrew got 1-3 in last post. 4) Probably Small-billed, but features separating this and the very similar White-crested and Olivaceous are not completely reliable (this is a trio where voice often is the only way you can be 100% certain). 5) Brown-and-yellow Marshbird.
  3. Rasmus Boegh

    5 more from Mostardas, Brazil

    Yes, Post 9 #2 is a Chestnut-capped Blackbird. The last post: 1) Olive Spinetail. 2) Southern Beardless Tyrannulet. 3) You're right. 4) Highland Elaenia. 5) You're right on the martin.
  4. Rasmus Boegh

    Mixed lot from Itatiaia, Brazil

    White lores on your birds. In the Azure-shoudered, they usually look like this: http://www.birdforum.net/opus/Image:Azure-shouldered_Tanager.jpg If doing a standard google search, you can unfortunately find loads of Sayaca Tanagers mislabelled as Azure-shouldered, which does make a bit harder...
  5. Rasmus Boegh

    Mixed lot from Itatiaia, Brazil

    #4 and #5 are potentially confusing, as it is a juvenile Green-headed Tanager. As a very general rule, juvenile Tangara tanagers are far more uniform than adults, and in the dimorphic species they most resemble females. Your coquette is a young male. Both #1 and the photo in post 2 are quite...
  6. Rasmus Boegh

    Plovers, Mostardas, RS, Brazil

    As I noted in a comment before its publication, the Semipalmated occurs regularly along the entire coast of Brazil.
  7. Rasmus Boegh

    Peruvian softail, or what

    Agree with cajanuma. Admittedly, it looks odd (somewhat resembling a female Tachyphonus on one of the photos), and I would have expected more white to the central underparts, but the rufous flanks can sometimes appear pretty extensive, and the photos are rather blurry. Certainly neither a...
  8. Rasmus Boegh

    Small white bird, southern Brazil

    White Monjita (Xolmis irupero). Common in RS and frequently perches on telephone lines.
  9. Rasmus Boegh

    Colombian Birds - ID challenge

    ... and that's what I suspected it was, although I was (and still am) uncertain about the possibility of Orange-crowned, even if the locality makes that less likely. The minor jump in altitude is well within reach for the Thick-billed. It should also be noted that female Thick-billed with a...
  10. Rasmus Boegh

    Paraguay October 2009

    Based on ~2 weeks in right habitat and region with the result being zero, I'd say pretty rare (... but perhaps I was just unlucky). I'll switch one of my Crimson-bellied sightings for a Black-bodied... Nice report.
  11. Rasmus Boegh

    ID please, birds of Colombia.

    Most of those photos show the Sparkling Violetear. The only exception is photo P1015417, which is a Short-tailed Emerald.
  12. Rasmus Boegh

    Colombian Birds - ID challenge

    First is one of the euphonias with olive-yellow underparts (i.e. not Orange-bellied, which looks like this near the Western Andes of Colombia). Exactly where was it photographed? The 2nd is a female Slaty Antwren. Agree with already suggested IDs for the last two.
  13. Rasmus Boegh

    ID please, birds of Colombia.

    Agree with the IDs already suggested for the first four photo. The very last photo (P1015260) is a Green or Sparkling Violetear. Impossible to separate from this photo.
  14. Rasmus Boegh

    Phaetornis maranhaoensis

    You should follow CBRO, which includes it as a valid species, and was the taxonomy followed in all but a few cases (though CBRO, like SACC, is continuously updated, meaning that some changes post-deadline have happened). Saying it "now" is considered a separate species is the only thing that...
  15. Rasmus Boegh

    Birds of Brazil by van Perlo

    Even if only parts are of direct relevance to the guide, this may be of use to some (a brief intro here). New posts are likely to be added at random intervals, though anything that takes longer than ~30 minutes to write is unlikely to end up there (longer posts will generally just be...
  16. Rasmus Boegh

    Global warming causing parasitic outbreaks in frogs

    There is a global trend, and there have already been several articles published (among others the by now rather famous article in Nature 439) that support a connection between global warming and the decline in amphibians, e.g. via pathogens such as the fungi Saprolegnia ferax and the infamous...
  17. Rasmus Boegh

    Birds of Brazil by van Perlo

    Illustrations of Scalloped (89.6) and Streak-headed (89.7) have been switched. Of note that, after the deadline of the book, it was documented that the distribution of the Scalloped actually extends northwards to south-central Minas Gerais, i.e. limited overlap in distributions of Scaled and...
  18. Rasmus Boegh

    Birds of Brazil by van Perlo

    Thanks for the nice words. There are sections I was not involved in and others where my recommendations have been missed (or switches), which have resulted in some problems (I might start an unofficial errata listing cases that could result in identification problems - cf. errata to the...
  19. Rasmus Boegh

    Black-billed Seedfinch

    The "female" is an immature male. Has been corrected in the OPUS. Regardless, very nice to see photos of this rarity.
  20. Rasmus Boegh

    ID - Flowerpiercer, Colombia.

    The difference in gloss is marginal at best, and while my experiance with the subspecies humeralis of the Black is limited, I remember being unable to use this specific feature with any level of reliability (seeing rather dull individuals that then revealed a black rump, and rather glossy...
  21. Rasmus Boegh

    san pedro tanager (southern peru) - what does it look like?

    (reply here: http://www.birdforum.net/showthread.php?t=156270)
  22. Rasmus Boegh

    san pedro tanager - what does it look like?

    Overall olive-tinged yellow. Crown rather orange border below by a black line.
  23. Rasmus Boegh

    ID - Flowerpiercer, Colombia.

    I suspect the 2nd may be a Black Flowerpiercer (careful; subspecies mixed up in Birds of Northern South America). Ana Maria: For future reference, please always post the original unedited photos when asking for identifications. Change of contrast and alike, as appears to have happened in this...
  24. Rasmus Boegh

    ? prob. idiotic black thrush, Puna highlands, Bolivia

    Never said it was a Great Thrush, but I did say it was either that species or the Chiguanco Thrush (and most likely the latter), which the photo confirms. There are significant racial variations (+ differences between the genders), and while it appears from the above that you expect the Great to...
  25. Rasmus Boegh

    HBW 14 announced

    ... interestingly, my opinion is the direct opposite. Possible just a matter of taste. I've always preferred illustrations that resemble the species as accurately as possible over more artistic illustrations, but don't know if this is what resulted in our very different judgements. Regardless...
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