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Natural history

Sparrow taking off

Lots of water in the wash this morning. I’m not sure if the photo is of it, but I saw a probable Rufous-crowned Sparrow this morning, a flock of them, with a two-pattern call, a lower cheep-cheep-cheep followed by a higher more rapid trill. Brown crown with grey stripe along the top, grey above the eye.


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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