Here are a couple of recent stories that I found interesting. How about this one, where there is evidence of a few species of birds who breed in North America who have a second clutch just as they are getting ready to make the trip south. (Orchard Orioles, pictured here, are one species noted.)
Or this one, quoted in the BBC, where different species share a nest box.
That is pretty amazing to see two species in one box. wow
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