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Nesting swallows

You can see the baby poking its head out of the hole. The colony was being attacked by starlings (one poked his head into the nest). I can’t decide whether these are Tree Swallows or Violet-green Swallows. One had a clear stripe above the eye, which indicates the latter; the blue black and the liquid notes included in the call indicate the former; on the other hand, Tree Swallows are meant to be further north at this time of year, and supposedly nest near water(!). I’ll look again later today.

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About Bill McCallum

I was born in Australia and came to the United States to pursue a Ph. D. in mathematics at Harvard University, met my wife, and never went back. I am a professor at the University of Arizona, working in number theory and mathematics education.


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