The female was restless and fidgety, and unlike during incubation she was holding her body up slightly, so I thought the chicks had hatched. As I watched, I caught a brief glimpse of a chick. I waited for the male to come and feed them, but he never appeared, so I gave up.

By that point the female had apparently already been fed by the male — she fell asleep inside the nest. ^^;

The female at a different location would dive at people passing by, but the people being attacked didn't notice. She pulls up at the last moment and never actually makes contact, so I suppose that's why no one catches on.

The attacks made me too nervous to check inside the nest, but from the way she was behaving I believe the chicks have hatched.

This one also appeared to have chicks — she was moving around inside the nest. You can just make out the female through the gaps in the nest material.