The two species are very similar but the male O. aesacus has a brilliant turquoise - blue sheen .
Ornithoptera aesacus is a member of the Ornithoptera priamus species group .
The two species are very similar but the male Ornithoptera aesacus   has a brilliant turquoise - blue sheen .
Ornithoptera aesacus is a member of the Ornithoptera priamus species group .