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Yellow Paloverde

Cercidium microphyllum for the small leaflets crowded along the branch. It has thorns at the end of the branch, not at the side like the Blue Paloverde.

Saw my first flycatcher of the season, probably an Ash-throated Flycatcher, but I can never tell without hearing the call, and it was silent. Also a hawk flying far above the wash.

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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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