1 Answer
They raise only one brood per year.
6dogs4us
Colleen
14 years ago. Rating: 0 | |
I just read two a year. OK one or two a year, that's good.

Tree swallows TYPICALLY only have one brood per year unless nesting fails.
I missed the unless nesting fails part. Could be why your info says two.
I was going to drop the link by you have to scroll forever to find the info.
I missed the unless nesting fails part. Could be why your info says two.
I was going to drop the link by you have to scroll forever to find the info.
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