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

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  1. 01101001

    Common Magpie ssp. galliae

    https://www.birds.cornell.edu/clementschecklist/introduction/updateindex/august-2018/updates-corrections-2018/ In 2018, Cornell's taxonomy dropped ssp. galliae citing Cramp and Perrins 1994: Mayaud 1933b seems to be about the avifauna of the Pyrenees (?), which would mean that the crucial...
  2. 01101001

    Nightingale sp., early song, 8 Apr in Warsaw, PL

    I presume Thrush Nightingale due to the dry rattles, unfinished and distorted whistling phrases (mixed singing), short phrases with long breaks (only the beginning of the season), and either sharp or buzzy vertical notes appearing in mid-frequencies at the end of many phrases. Can we age the...
  3. 01101001

    Woodpecker song treatment by eBird

    These two clips were marked as songs by their respective recordists. Contrary to these labels, eBird has them described as calls in the respective species' accounts. Do any other non-Cornell-affiliated sources support this treatment? https://macaulaylibrary.org/asset/213502081...
  4. 01101001

    Sexing (adult male) Common Kestrels by head colour

    How grey can the head of an adult female get? Do I need to consult tail pattern (uniform grey uppertail with no barring except for the thick terminal band) before confidently sexing Kestrels?
  5. 01101001

    Reed Bunting's call like Robin's (supposedly)

    Has anyone heard Common Reed Bunting make such calls, or is it safe to assume that eBird's clip of the recording below is a mistake, as Robins can skulk in reeds as well, making a sound overlap possible? eBird's clip is the last recording labelled 'Call' in the sequence (accessible by clicking...
  6. 01101001

    The ultimate range maps

    For those who (like me) didn't use to know that the Global Biodiversity Information Facility (GBIF) has its own range maps combining all available recording schemes, and very detailed ones, too (of course, some stray records of what may look like vagrants will be mistaken because the info is...
  7. 01101001

    Willow Tit song, Warsaw, 25 Feb

    thujas, trees, garden, tall grass (NIMBY) Randomly heard this song several times coming from the same spot. Bird not seen. Habitat rather wrong unless on some migration. Does anything mimic the song of Willow Tit? Most probably not from a human.
  8. 01101001

    Long-tailed Tit ageing on bare parts

    I've just read that the eyering changes colour depending on age: according to an article by published on the Polish Society for the Protection of Birds website, it's pink for juveniles, red for immatures and yellow for adults (I might've misconstrued the ages for pink and red).* The feature is...
  9. 01101001

    Great Tit's mimicry of Blue Tit

    Just a word of caution. There were actually two Great Tits making that call to each other. Tit identification by call back to square one (at least for me)?
  10. 01101001

    Black-headed Gull

    Can it show a thin black outer border to the primaries and not the usual black patch towards the outer end of the wing? Mostly asking to share my suspicions of a possible Bonaparte's Gull. No photos or anything more serious, but it stood out, so I looked up Focus On: how to separate Bonaparte's...
  11. 01101001

    Poll & petition: proposed cull of almost half a million Barred Owls

    https://www.birdforum.net/threads/usfws-barred-owl-removal-plan.449045/ Here's the link to the petition: https://www.change.org/p/stop-the-u-s-fish-and-wildlife-service-from-killing-barred-owls If you want, you can also sign another petition, which I've just started...
  12. 01101001

    Small island birding

    If you were to be stuck on a small island (with limited bird diversity) till the end of your life, which island would it be and why, bird-wise? (It doesn't have to be a tropical island.) I think maybe Fiji (but I've hardly had a proper look at other contenders) because of...
  13. 01101001

    The newly updated eBird Status and Trends 2012-2022 (inclusive)

    https://ebird.org/news/new-data-and-tools-for-ebird-status-and-trends mind-boggling accuracy--zoom in to see your local patch some better-twitched vagrants can also be seen, e.g. the 2022 Eastbourne American Robin or some Fieldfares in the ABA area
  14. 01101001

    Gallery: November raven in southeastern Victoria, Australia

    Eagle Point, Victoria - Wikipedia, coastal southeastern Victoria in November 2004 not a House Crow; possibles include Australian Raven, Little Raven and Forest Raven Forest Raven because of the big bill? (or maybe unidentifiable) https://www.birdforum.net/gallery/house-crow.38518/...
  15. 01101001

    What did dinosaurs sound like

    https://www.bbc.com/future/article/20221212-the-mysterious-song-of-the-dinosaurs
  16. 01101001

    Aula Verlag's 'Die Stimmen der Vögel Europas', book + DVD

    Internet prices for the set (book + DVD) range between 39 € and 129 €. I'm trying to get it for a library in Warsaw, PL (it would only be the second such book in the country, as far as I know), but--understandably--I don't want them to overpay. Are there any dedicated German bookshops, in which...
  17. 01101001

    First observation of a brood patch on a male sunbird (Chalcomitra amethystina)

    https://link.springer.com/article/10.1007/s10336-022-01964-7
  18. 01101001

    Not quite a Goshawk

    Found stuffed at an airport (seized by the customs), so no further information. Merlin says Black Kite, and it looks good to me, though I've never seen one. Correct?
  19. 01101001

    The popularity of birdwatching by country

    Which countries have the largest proportion of birdwatchers*? From what I've managed to find: There's the US (around 20% of people aged 16 or more: How Popular Is Birdwatching | Birda), the UK (around 9% of the entire population: How Popular Is Birdwatching | Birda), and this source: The...
  20. 01101001

    Gull by call, Warsaw, Poland, yesterday

    It was a Larus gull for sure, and not a Common Gull. The call that drew my attention was a very distinctive nasal 'EH'. BirdNET suggested Lesser Black-backed Gull with rather low confidence, but when I listened to its calls, they sounded spot on. The gull was flying away already when I managed...
  21. 01101001

    Strange Magpie sound, 7 Mar, Central Poland

    I believe these sounds were repeated over and over by at least one Magpie perched on a treetop. I'd never heard it before and wonder what they could be or what function they could serve. A subsong would be my best bet, but isn't it too loud for a subsong, and shouldn't a subsong be more varied...
  22. 01101001

    Songs and calls, Warsaw (Poland), today

    Habitat: tall grass and herbage, bushes, scattered trees, ditch, river 1) Here are two clips identified as a singing Whinchat by Merlin, and, while I'd be inclined to believe it given the clips are pretty long (and the original was even longer), I'd prefer to tick it when I'm able to better...
  23. 01101001

    Opus, (mostly) Moroccan subspecies of Thekla's Lark

    I was wondering how far we can get with these pictures. * * * Range descriptions from Galerida theklae (Thekla Lark) - Avibase or the newest Clements checklist. erlangeri N Morocco (e to Algerian border, s to Middle Atlas) ruficolor NE and c Morocco, coastal Algeria and n Tunisia...
  24. 01101001

    Song ID, Warsaw, Poland, 15 Apr

    My first impression and educated guess after listening to it would be Song Thrush, however, a few things bug me: the repeated low wavy warbles, and the up- and downward glissandi (for lack of a better name). The first recording is clearer and more varied than the second, even though both were...
  25. 01101001

    Your favourite pigeon/dove coo

    The idea for this thread came to me today when I heard a displaying Feral Pigeon. I'd heard Feral Pigeons many times before, obviously, but it had never occurred to me that their coo sounds so attractive. There are dozens of pigeons and doves all over the world, and many members are either...
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