The incubation period for Barn Swallows is 12 to 17 days. Generally the clutch size is about 3 to 7 eggs.
It could take the average barn owl a single days up to multiple weeks. I might be able to give you a more accurate answer if I knew about how long a day the owl or owls work.
They stay by their nest and don't move much Or often Stay in one Place and look for food
by clinging on to the nest
12hrs
Baby barn owls stay in the nest for 50 to 55 days before they are ready to learn to fly. It takes about 10 to 12 days for them to open their eyes after they hatch.
About 15 days.
it is pink
7 to 10 days
swallows
Barn Owls mate for life... other types do not
Crows mature and grow rather fast. In about 4 weeks they are mature enough to leave the nest.
Barn owl eggs take 31-32 days to hatch.
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