Do any birds fly at night?

[Two_Sheds]

Males and female Robins look identical, but young birds have no red breast and are spotted with golden brown.
Robins sing nearly all year round and they will sing at night next to street lights

Robins are very aggressive to other robins, and will fight to the death over territory ... a robin will even repeatedly attack a toy robin or a tuft of red feathers.

Maybe you could put out a decoy robin, to see if it gets attacked. A wren would'nt attack the decoy ?

[poozie]

Wrens like to pile in to holes in trees, old nests, crevasses etc and huddle together to keep warm, so i am led to believe

Wren, Troglodytes troglodytes