• Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.

    Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Parasiticus vs. long-tailed jaeger - Portugal 18/09/2022 (1 Viewer)

Hi everyone,

I took pictures of 2 juvenile jaegers yesterday (18/09/2022) at Cabo Raso, on the west coast of Portugal near Lisbon, flying ~200 m off the coast. Both are entirely dark blackish-brown:
Photos 1-8: bird 1
Photos 9-12: bird 2

I am having some difficulty in classifying these birds as S. parasiticus or S. longicaudus. This last species is rarely seen on the west coast of Portugal, so I would favour these birds as S. parasiticus. However, both individuals show only a very small white band at the edge of the upper face of the wing. Bird 1 shows a pale beak (clearly seen if you zoom in photo 4) and bird 2 appears to have a long thin tail (observed in photos 10 and 11).

Thanks a lot in advance. Best regards,



  • photo1.jpg
    162.3 KB · Views: 47
  • photo2.jpg
    153.8 KB · Views: 44
  • photo3.jpg
    163 KB · Views: 41
  • photo4.jpg
    141.8 KB · Views: 45
  • photo5.jpg
    144.9 KB · Views: 45
  • photo6.jpg
    149.6 KB · Views: 41
  • photo7.jpg
    163.8 KB · Views: 42
  • photo8.jpg
    153.9 KB · Views: 42
  • photo9.jpg
    165.9 KB · Views: 45
  • photo10.jpg
    182.9 KB · Views: 44
  • photo11.jpg
    209.5 KB · Views: 42
  • photo12.jpg
    199.7 KB · Views: 50
Both Arctic Skuas in differing phases. White wing flash on upper and lower rules out Long Tailed Skua. Lack of barrel chest and deep body rules out Pomarine.
Warning! This thread is more than 2 years ago old.
It's likely that no further discussion is required, in which case we recommend starting a new thread. If however you feel your response is required you can still do so.

Users who are viewing this thread