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

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  1. nartreb

    What does this bushtit have?

    one of those aquatic invertebrates that inhabits a sort of coccoon decorated with all sorts of odd bits?
  2. nartreb

    French Guiana in July

    Yes. Eye color and tail proportion rule out shiny (or giant) cowbird, and I don't think any other grackle or blackbird is in range.
  3. nartreb

    some type of thrush? S.E. Massachusetts today

    Agree with veery. Overall cinnamon color, weak chest spots.
  4. nartreb

    Mystery bird outside Munich, Germany

    What kinds of sandpiper do you get around there?
  5. nartreb

    How can I tell the difference between Eurasian teal female and American Teal female ?

    Good luck! First I'll note that the American Orn. Union is a holdout and considers these as two subspecies of "Green-winged teal", contra everybody else. Audubon.org says "female not safely identified" as to American vs Eurasian. If you check the more reputable websites (Audubon, Cornell, etc)...
  6. nartreb

    Newbie here

    Great Crested Flycatcher is correct. There are a few other closely-related flycatchers that look very similar, but in Atlanta it can (almost) only be Great-Crested. (There's a tiny chance of Ash-throated Flycatcher, but your photo shows it isn't one. Your bird has a darker throat, yellower...
  7. nartreb

    Oregon Junco (Dark-eyed Junco)

    Birds don't stop defending their territory just because a day or two has gone by. Expect this to continue for weeks.
  8. nartreb

    Weird evening bird behavior in my area!

    What's your location? (Texas or Florida, I'd guess...) I can't quite see what type of birds these are but they do appear to be chasing insects.
  9. nartreb

    Birds with very tight habitat requirements.

    There have got to be a few cavity-nesters who nest in areas with few available species. Gilded flickers and saguaro, for example. Some food specialists too - crossbills on spruce come to mind.
  10. nartreb

    Tree goose

    I don't often see geese from that angle, but it's definitely not a Canada. Tail color all wrong.
  11. nartreb

    What birds made this nest?

    It's not nearly finished. Leave it alone. Lots of cavity-nesters use grass in their nests, can't say much about what species it is from this.
  12. nartreb

    Bird with powder blue belly brown wings and head in CNY feeder today 04_24_24.

    Are you quite sure about the blue color? Was there anything nearby that might cast a blue light on an otherwise white belly and tail? (e.g., the feeder itself, or a large blue tarp on the ground nearby) See how the lower belly of this bird looks pale blue, when it's actually white...
  13. nartreb

    Michigan - female bird?

    In Michigan, this is unquestionably a brown-headed cowbird. This time of year it is at least a year eight months old, so I think it's safe to identify as female. edit; yep, juveniles (which look a lot like females) molt into "first winter plumage" (which is very similar to adult plumage) in...
  14. nartreb

    Newbie - chirping noise at night

    Also anything you can do to describe the sound and where it seems to be coming from. Could it be coming from your attic, or is it somewhere in the trees at the far side of your yard? Is it always from the same place? How long does each chirp last, how long between chirps, how many times...
  15. nartreb

    Bird identification question

    Grey catbird indeed. The brick-red vent is something most people don't notice right away, you have a good eye for detail.
  16. nartreb

    Greater/Lesser Scaup? -Kansas City

    There's a lot of variation and overlap, so it's not really reliable, but yes, very extensive white on the face is an indicator that you might be looking at a Greater. And unlike bill proportions (eg., larger nail), it's quite easy to see in the field. So it's not definitive, but it can be helpful.
  17. nartreb

    Help!!

    I agree with blue jay, based on posture, tail shape, and those bright white spots under the tail. They can make lots of interesting noises, and some individuals are very playful and will invent new sounds.
  18. nartreb

    Thrushes, all different. April 2024 Florida. Sorry for back of camera photos but please ID if possible

    Eye ring brightness can be quite difficult to judge, both in person and in photos. It really depends how the light hits them. I try to distinguish Swainson's from grey-cheeked by color - mostly lores but also cheek/mustachial pale areas. I would lean toward swainson for #2 = -2809.png and...
  19. nartreb

    Northeast Thailand … A cinnamon-coloured, pheasant-sized daily visitor, locally called 'Nokaput' and which sings like a chorister!

    Is this an identification question? The two species are pretty easy to tell apart - look at the amount of white in the wings and you can't go wrong even at a distance. I believe rufous is more common and widespread but both are possible at your location - it's possible that you are seeing both...
  20. nartreb

    ID help on Rail - Bolivar Peninsula, Texas, USA

    Looks good to me. Long mostly-yellow-orange bill (too long and pale for Virginia, probably too bright for King) , grey on face mostly behind the eye (not as extensive as on Virginia, more extensive than King). If you have any other photos, it would be good to get a view of the stripes on the...
  21. nartreb

    Thrushes, all different. April 2024 Florida. Sorry for back of camera photos but please ID if possible

    Need to see real photos. I don't think the colors are real on two of them which means I probably shouldn't trust the other two either. I'd guess 08 is Swainsons and 10 is grey-cheeked/bicknell; the other two have unnatural colors and could be anything.
  22. nartreb

    New Zealand - North Island

    That would be my first guess as well, but I'm rubbish at plovers. These ones are quite plain, which even in non-breeding plumage makes a lot of the "ringy" plovers unlikely, and I get the impression that they're small (so lesser sand-plover rather than greater, perhaps) but I haven't a clue how...
  23. nartreb

    New Zealand - North Island

    Plovers in non-breeding plumage... good luck.
  24. nartreb

    BOP - Puntarenas, Costa Rica, Apr 2024

    In addition to the things pbjosh mentioned, the very thin white stripe on the tail looks much better for double-toothed kite than for crane hawk. First photo here is from the same angle, note in addition to the very thing tail stripe: the pouffe of white feathers at the top of the legs, hint of...
  25. nartreb

    Unknown - Puntarenas, Costa Rica, Apr 2024

    Thanks Niels, that was bothering me! You can see a white stripe on the tail, and anyway there's not a lot of options with legs like those. Plumage is variable, but here's a dark one: https://cdn.download.ams.birds.cornell.edu/api/v1/asset/193773861/480
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