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

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  1. J

    Kites in Nakhon Nayok, Thailand earlier today.

    The eastern subspecies of Black Kite lineatus is often called Black-eared Kite - so it is not exactly the same thing. I agree that the Subalpinebirding article is good, but it does not discuss subspecies govinda, often called Indian Kite, and that is the other taxon occurring in SE Asia. I...
  2. J

    Question about migration of Great Spotted Woodpecker

    Yes, it is possible to stay at the Hanko bird observatory, if you agree to join the migration counting or ringing. The web pages are only in Finnish and Swedish: Etusivu - Hangon lintuasema (from the little flag you can change to Swedish). The same is true for most Finnish bird observatories...
  3. J

    Question about migration of Great Spotted Woodpecker

    In Finland, the biggest numbers occur normally at the west coast, and early August. This year has been very good, for example 13662 at Kalajoki 1, August, 6450 at Hailuoto 3 August and 3569 at Pori, 5 August. Here some statistics from Hanko Bird observatory, which is at the south coast...
  4. J

    Juvenile Marsh Warbler? (Netherlands, Oostvaardersplassen, July 14th, 2023)

    Yes, the bird is an adult. I think that the appearance of the head is part of normal moult. I see this kind of heads quite regularly in adult Eurasian Reeds, and sometimes also in Marsh Warblers. I do not remember ever seeing it in Blyth's Reed Warbler. I think that colour of the legs...
  5. J

    Marsh tit or coal tit?

    Yes, Great Tit. Coal Tit faster, higher and thinner. Marsh Tit may have very much this same rhythm, but the tone of the song is quite different, more like its call.
  6. J

    New edition of Fågelguiden (Collins Bird Guide).

    I have heard that the app update is in preparation, but nothing about the schedule.
  7. J

    Eastern Buzzards: what determines the width of the dark trailing edge of underwing?

    Darker individuals have broader trailing bands on average, but more importantly, adults have those broader than first years. And both refectus and japonicus have those narrower than vulpinus, when comparing the corresponding age classes. Ageing is very important in this case.
  8. J

    Crossbills

    One plausible hypothesis for avian vocal dialect development is that they develop as a by-product of dispersal and vocal learning by mimicking other individuals, without real function. But very probably there is no such general explanation for dialect formation which fits to every case and...
  9. J

    Raptors ID help. Sarawak, Malaysian Borneo.

    They are Jerdon's Bazas. The best visible difference in these photos is the barring of the wing feathers: distinct black bar at the trailing edge, then greyer and less distinct bands towards to the bases of feathers. Pernis species have more distinct internal bars and lots of small greyish bars...
  10. J

    Do theories regarding the mechanisms for Vagrancy stand scrutiny, and what does vagrancy tell us about migration?

    I am not a big fan of the theory of reverse migration either. It seems to work in some cases, but even the classic flycatcher example has its shortcomings. In addition to what you mentioned - it seems to predict that Collared Flycatchers are vagrants to the north of their breeding areas in...
  11. J

    Please ID this vulture

    Compared to first-year White-rumped: huge wings compared to very small head with very pale feathering, longish tail and long undertail-coverts, broad body. Compared to first-year Eurasian Griffon: darker colder brown body plumage with more prominent streaking, narrower pale bars on underwing...
  12. J

    Please ID this vulture

    Yes, both are Himalayan Vultures. The first bird is first-year and second bird second-year. In this slowly maturing and moulting species the first two age classes are very similar, especially in (quite frequent) cases like this when no secondaries are moulted during the second calendar year...
  13. J

    Wallace's Hawk-Eagle, adult or young adult? Sarawak, Malaysian Borneo

    The tail is post-juvenile, there are secondaries of different age but not apparent juvenile feathers left (but spread wings may still reveal interesting details). Body plumage is quite pale and warm brown, but Bornean adults are often just like this (darker and more contrasting in the...
  14. J

    Bird migration day by day - what distribution, can an AI prediction be made?

    Weather and the time of year are the most important factors. The first mentioned is a very complicated thing. For example, not only local weather should be taken into account, conditions in different altitudes often vary, and the effect to observability which depends often on weather. At...
  15. J

    Harrier question - France

    Here's one from Batumi, 21 September 2017 with two complete pale bars on secondaries. No photos from upperside of this individual.
  16. J

    Reed warbler near Warsaw, Poland

    I would say that the bird could well have been Blyth's Reed, but it is impossible to be sure. BRW call is quite similar to Blackcap, more similar to Lesser Whitethroat, even more similar to Sedge Warbler and still more similar to Marsh Warbler. I have lots of experience with all of these, and...
  17. J

    Buteo for ID, North Bengal, India -

    It really looks like the expected Himalayan Buzzard adults often look - somewhat reddish, diffuse streaking on the breast, uniform dark brown belly patch. So it is does not look like B buteo vulpinus, confidently excluding migrant more eastern small Buteos is difficult if not impossible.
  18. J

    Red or Black Kite? (Istanbul/Turkey)

    I agree that bird in post 1 is different individual to bird in post 10. If you look closely the barring in the middle primaries of the right wing you see some differences. Hybridisation of Red and Black Kite is quite well known, here is one article with photos of a mixed pair: Conservation of...
  19. J

    Campaign to standardise the capitalising of English names of species

    Unlike in English, in many languages the bird species names are compound words and therefore easier to parse from the sentence. For example, New Caledonia Chicadabird in Finnish is uudenkaledoniankäpinkäinen. Note that even the geographical name is not capitalised, and although New Caledonia...
  20. J

    Please id of this Accipiter! sparrowhawk/shikra

    Eurasian Sparrowhawk of course has streaked throat without any real mesial stripe but sometimes one very slight resembling that may be seen. The attached photo is from Finland and this kind of pattern may be exaggerated in some photos or light conditions.
  21. J

    Baltic trip in February

    This
  22. J

    Baltic trip in February

    About Steller's Eider. There are recent records of 50 individuals in 6 January and 30 individuals 31 December, between Harilaid and Undva, in NW Saaremaa - the normal site. The area is quite remote and therefore not too much visited, and it is possible that nobody else have been there recently.
  23. J

    Finland. Juvenille Owls to ID.

    Eagle Owls indeed. The species was quite scarce as a breeder that time, and was still totally unprotected, it become commoner and expanded to the areas closer to human habitations after it got the legal protection from 1960's. Probably soldiers had found the owlets and taken them as pets...
  24. J

    Appeal to find 10 of the World's rarest birds

    Is it just me, or are there just nine species in the original list? And including Ivory-billed Woodpecker but not Jerdon's Courser? Some species really lost?
  25. J

    Eastern or Western Marsh Harrier, Jiangsu province,China

    I share the cautious approach of SteveMM. This kind of head pattern is of course not impossible, nor even rare in Western, but easier individuals are still more common. A couple of details even suggest positively Eastern: largish pale area on the bases of the primaries on underwing (in Western...
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