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Recent content by jalid

  1. J

    The best book about loon family?

    Lommar by Lars Jonsson and Toralf Tysse, published 1991, if you read Swedish and can find it somewhere. It covers only four species - Jonsson added Pacific Loon in a later article in Vår Fågelvärld. (But of course, a lot have been written about pacifica after that in various European magazines).
  2. J

    Robins with or without grey faces?

    There is an article, Pettersson, Hjort, Lindström & Hedenström Vår Fågelvårld 5/90, about the variation of Robin based on birds migrating in Sweden and wintering in several areas in southern Europe. They concluded that males are greyer than females, and eastern birds are greyer than western...
  3. J

    BWP on CD-Rom

    Years ago, I copied the contents of the cd to my hard drive and keep using them straight from there. Photos and drawings are jpgs, text html and so on. Lots of files but still useful.
  4. J

    Red throated diver? Norfolk UK today.

    Yes, it is Red-throated, from the shape of the bill and pattern of the neck. I have seen tens of thousands of both Red-throated and Black-throated migrating, often in mixed flocks, but I am not able to identify them from their wing action.
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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.
  10. J

    New edition of Fågelguiden (Collins Bird Guide).

    I have heard that the app update is in preparation, but nothing about the schedule.
  11. 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.
  12. 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...
  13. 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...
  14. 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...
  15. 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...
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