On Tue, 20 Jun 1995, Ted Becker wrote:

> On Tue, 20 Jun 1995, Dennis Paulson wrote:
>
> > Or "prebreeding"and "postbreeding" migration, and then its direction or its
> > season wouldn't matter one whit (speaking of Swainson's Thrushes).
>
> This statement brings to mind a question I've been wanting to ask. How
> many migrants fly south to another breeding season? Seems possible that
> a bird could fly back and forth across the equator and experience two
> springs and summers a year.
>

In general, I think it's very rare songbirds to have two such separate
breeding seasons. However, volume 1 of Birds of South America cites a
breeding record during the austral summer of barn swallows in Brazil. I
don't have the book here at work with me, but the record was for
sometime in the 1980s.

Mike Donahue
mdonahue at u.washington.edu