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

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  1. Joern Lehmhus

    Kestrel, Lesser or Common French Pyrenees

    I think it is a Common with these barred secondaries and this moustachial stripe
  2. Joern Lehmhus

    Wagtail, Findhorn River 06/05/24

    It is a White
  3. Joern Lehmhus

    Taiwan BoP ID please

    my try to lighten it
  4. Joern Lehmhus

    Various at Eyebrook Res, South Leicestershire, UK

    It is drake Gadwall,yes...
  5. Joern Lehmhus

    An odd feather found on a patch walk on a plain in Epping Forest.

    https://media.featherbase.info/images/dfe2dd4c-78c6-4fc4-b03f-0224576650d3_full.jpg https://i.etsystatic.com/8720326/r/il/26f8b4/5059676835/il_fullxfull.5059676835_1btt.jpg
  6. Joern Lehmhus

    An odd feather found on a patch walk on a plain in Epping Forest.

    I think is a tail feather of a female mallard .. definitely not a scapular, these wouldn´t be pointed and not that flat looking, also not a tertial which can have a somewhat similar pattern in a few female mallards, but would be larger
  7. Joern Lehmhus

    Female hooded merganser? Eastern Ontario, Canada

    Could well be eclipse male due to yellow iris and all dark bill- however that would be early, I think...
  8. Joern Lehmhus

    Snipe and Dove from Mongolia

    But that seems similar also in these birds which seem to be identifird as hybrids: https://siberia.russia.birding.day/v2photo.php?l=en&s=070800070&n=2&t=1616&p=0&sortby=1&sor=desc&saut=all&si=sib...
  9. Joern Lehmhus

    Snipe and Dove from Mongolia

    Agree that it looks good , but is it fully safe to exclude a hybrid ? Not doubting your ID, but I do not have much experience with the species and Liebzi stated the bird was with feral pigeons, so I am interested to learn ...
  10. Joern Lehmhus

    Snipe and Dove from Mongolia

    Concerning the pigeon, Hill x feral Rock can show a rather broad pale tail area before the dark band, at the base of the feathers there is again a dark band, but i think often less sharply bordered to the pale band than in Hill pigeon, more washed out in a hybrid . The pale band itself can be...
  11. Joern Lehmhus

    Odd duck- mallardlike male without breeding plumage in Leipzig, Germany this march

    And it is the same variability in for example, mallard x koloa, mallard x pacific black duck etc. .. so I think probably not a single gene involved, but some more...
  12. Joern Lehmhus

    Odd duck- mallardlike male without breeding plumage in Leipzig, Germany this march

    huge variability , you can find a gradual change from nearly mallardlike birds to nearly black duck like birds...
  13. Joern Lehmhus

    Odd duck- mallardlike male without breeding plumage in Leipzig, Germany this march

    The intersex plumage in females seems to be in general due to hormonal issues. If female birds are low in estrogenes due to very old age or some pathological issue as for example ovary cancer, they tend to develop male plumage characteristics. This has been found for single individuals of...
  14. Joern Lehmhus

    Washington state may 24, gadwall or female cinnamon teal?

    To me also, this looks good for Cinnamon Teal
  15. Joern Lehmhus

    Odd duck- mallardlike male without breeding plumage in Leipzig, Germany this march

    This would be examples for domestic mallard breeds where male and female are more alike: https://www.dunlaphatcherypoultry.com/wp-content/uploads/2020/01/BLUE-SWEDISH-PAIR.jpg https://m.media-amazon.com/images/I/71yzLgL5f-L._AC_UF894,1000_QL80_.jpg...
  16. Joern Lehmhus

    Odd duck- mallardlike male without breeding plumage in Leipzig, Germany this march

    What sex then? As far as I know there is no possibility for a breeding plumage male domestic duck to show that much female type plumage . Yes, there are breeds where male and female look more similar than in wild mallard, but these have plumages highly deviating from wild type mallards. This...
  17. Joern Lehmhus

    Odd duck- mallardlike male without breeding plumage in Leipzig, Germany this march

    found by Micarusa and sent to me for identification help.... Micarusa informed me that this mallard-sized bird displayed as a male mallard, in a group with typically colored male mallards. It did the grunt-whistle, for example... I first considered an intersex plumaged female, but with that...
  18. Joern Lehmhus

    Various Raptors - South Essex UK - 12th May

    Well, from that single photo I think you can´t say that either of the birds looks like WTE. As you also proposed, I think the white is an artefact due to sun , like the reflection on the wing of this crow, which surely isn´t pale grey ...
  19. Joern Lehmhus

    Various Raptors - South Essex UK - 12th May

    which one? I see WTE fairly often in Northern Germany and can´t see either of the birds as that species ???
  20. Joern Lehmhus

    Scaup Type , Letham Fife

    It is a Tufted x Common Pochard, as already said and as shown by the shape of the black area at the bill tip and the head shape . However, also in this cross the grey areas are finely vermiculated - but much finer than in a scaup sp. x tufted duck
  21. Joern Lehmhus

    Gull, Salton Sea, California, USA 12 May 2024

    i think that is still in range for Franklins, as this species can show that also but less pronounced some Franklins https://www.oiseaux-birds.com/charadriiformes/larides/mouette-de-franklin/mouette-de-franklin-br-ra4.jpg...
  22. Joern Lehmhus

    Strange Goose North Georgia USA

    Big belly, so a domestic goose is involved ...But as the bill is not black it can not be canada x domestic swan goose (chinese goose ). it could be Canada x donestic greylag , or canada x (domestic greylag x Chinese goose), as domestic greylag x chinese goose hybrids are fertile
  23. Joern Lehmhus

    Hybrid baikal teal ? at Top Hill Low , Yorkshire last weekend.

    A clear Baikal teal x Northern shoveler from the Netherlands for comparison https://waarneming.nl/media/photo/89387909.jpg
  24. Joern Lehmhus

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

    Thank you very much, Stephen!
  25. Joern Lehmhus

    Odd goose in Germany

    It is a rather typical barheaded x barnacle goose . But note this hybrid is variable and much darker birds are possible in this cross (and also in other barnacle goose hybrids ) In this cross also light colored birds with a less pronounced black breast are possible .
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