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Zebra-tailed Lizard

These are the guys that are skittering across the desert all the time, pausing to wave their tails in the air. Sally tells me this is a message to road-runners not to bother to try to catch them, because they are too fast.

Also saw a family of Cactus Wrens arguing on top of a Saguaro. The swallows weren’t there today. Maybe they were migrating Tree Swallows.

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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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