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Mud-covered twigs

Lots of mud tubes, each containing a twig. The mud is not stuck to the twig, rather it’s a genuine tube with twig inside. My best guess is termites.

Also found a feather, black with white scallops along the edges. Probably a Gila Woodpecker’s wing feather.

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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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