I would say that's an Arctic Skua too, the bill and the pointed tail suggest Arctic to me.
It's no Pom anyway I think we've established but Arctic must be a huge rarity in Indonesia, not even shown as a passage migrant on Birdlife?
Immature skuas are notoriously difficult; FWIW, I would go with Arctic on this one too. As has already been said, the proportions of head & bill are more suggestive of this species than Pom or Long-tailed.
RB
Status in Indo?
All three are uncommon migrants with Arctic being the least common.
I don't know what tail shape first-summer and 2nd summer LTS have. Anyone know?
Thanks!pointed, tail is ok for a second year LST.