Strange fly

Strange fly

Observation - Strange fly. Description: Scarcely looks like an adult fly - so pale and eyes a bit odd. Thought at first some kind of instar, but flies are just larva, pupa, imago aren't they? Anyway the wings are fully developed. Help!

Scarcely looks like an adult fly - so pale and eyes a bit odd. Thought at first some kind of instar, but flies are just larva, pupa, imago aren't they? Anyway the wings are fully developed. Help!