nocturnal bird sounds

Birds
Are birds active at dusk?
0
Birds
Do birds build nests at night?
10
Birds
Why do birds scream at nothing?
9
Birds
How long does a bird sleep?
33
Birds
How many birds can sleep while flying?
40
Birds
What birds Can you hear at night?
42
Birds
Which UK birds are nocturnal?
43
Birds
Where do birds go all day?
49