[When Quentin brings up the wings, Steven takes a closer look at them. They tint the water? Now he's wondering how that works. He doesn't know enough about insects to trace it back to anything.

At the question, his own wings strain themselves a bit, their position tilting backwards.]

Ah, no, I barely moult. For most birds it's seasonal, so I expect I might be in for a trail of feathers everywhere I go when winter comes 'round, but... Depends whether angel wings follow the same rules as bird wings, doesn't it? Maybe they don't moult at all. There's not a whole lot of Nephilim around to ask.