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Budding prickly pear

Interesting the way it puts out all the spine spots first (I assume that’s what the red protrusions are).

Saw a pair of Ash-throated Flycatchers, confirmed by their call—they have broken silence and started mating. Also some glorious views of the Harris’s Hawk as it followed along from telephone pole to telephone pole.

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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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