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

Recent content by D Halas

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    Petition to AOS Leadership on the Recent Decision to Change all Eponymous Bird Names

    Here's the relevant text from the Forty-Second Supplement: "The Committee was petitioned by a group of biologists from the U.S. Fish and Wildlife Service in Alaska to change the English name of Clangula hyemalis from Oldsquaw to Long-tailed Duck, the name used for the species outside of North...
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    Britain's most prolific egg collector, reoffends again.

    How disappointing - now you'll never be able to hatch any replica Great Auks.
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    Toronto spring: if limited to public transport, how much can I expect bird-wise?

    While Point Pelee is guaranteed to get multiple rarities in May, Toronto and the surrounding suburbs always get a few as well, and sometimes they're good enough that people at Point Pelee will drive the three-plus hours back to Toronto to see them (for example, the provincial-first Hepatic...
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    Sandpiper/yellowlegs confusion - S Florida

    2 is a Lesser Yellowlegs; 1 and 3 are Solitary Sandpipers. Least Sandpipers are much smaller than you think.
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    Help identifying this bird - Ontario

    It's definitely a Red-winged Blackbird. The red patch is often hidden under a layer of black feathers.
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    Two people break 10,000 species, and on the same day? Can it be?

    An interesting philosophical question indeed, as it's still the actual photons that bounced off the bird collecting on your retina. Perhaps the interesting philosophical answer is that refraction (binoculars, scopes, eyeglasses) counts, but reflection doesn't?
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    Raptor, Mexico-City, February 2023

    On the AOU Checklist it's been Harris's Hawk since 1998: https://darwiniana.org/zoo/AOUb.html
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    Britain's most prolific egg collector, reoffends again.

    This film clip will provide some context to North Americans baffled by the idea of egg collecting:
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    A Wee Puzzle...

    Oh, well spotted!
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    A Wee Puzzle...

    Javan Frogmouth covers all of the letters unique to Fulmar and Jay.
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    General taxonomy megathread

    Based on what happens when you mix blue and gold, I would suggest Green-winged Warbler.
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    Latest IOC Diary Updates

    The hyphen is there in Quail-Dove because of a different rule which states that birds named after other birds must have a hyphen in their names. This seems fairly universal; the IOC follows this rule, while it doesn't follow the AOS's monophyletic group hyphen rule. The hyphen is there in...
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    Bird ID - Bluffers Park, Toronto, ON

    Is the gull not an Iceland Gull? I don't see much black in the primaries, and the shape of the head looks right for one.
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    AOU-NACC Proposals 2024

    Greenland is included in the checklist area since the 58th supplement in 2017: https://academic.oup.com/auk/article/134/3/751/5149324
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    Wallpaper

    The birds, but not the background foliage, are taken from Audubon's Birds of America plates. The top bird is a Yellow-throated Warbler: https://www.audubon.org/birds-of-america/yellow-throated-warbler While the bottom one is a "Blue-green Warbler", Audubon's name for the female Cerulean...
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