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Pacific spiketail

Saw this dragonfly on the Matt Davis trail, Cordulegaster dorsalis, also known as the Wester Flying Adder and the Yellow-backed Biddie, according to California Dragonflies. Also some lovely ash-blue small butterflies near the top of the trail. The hill-side is covered with Bush Monkeyflowers, Mimulus aurantiacus, tubular yellow five-petaled flowers with bilateral symmetry, bright green oval leaves, and the invasive weed Convolvulus arvensis, a vine with with white, pink-tinged, fused, five-petaled flowers. Saw an Allen’s Hummingbird and some Chestnut-backed Chickadees.

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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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