Monarch Sightings in the UC Davis Arboretum: Cause for Celebration

May 26, 2017

What a delight to see.

We strolled through milkweed patches in the UC Davis Arboretum Thursday noon and saw them.


The monarch butterflies (Danaus plexippus) are returning from their coastal California overwintering sites. And we're getting new generations.

The UC Davis campus, including the 100-acre UC Davis Arboretum is home to much celebrated flora and fauna, including milkweed and monarchs.

After overwintering along the California coast and in central Mexico, the butterflies flutter north into the United States and Canada in the spring and summer.

However, scientists report that the monarch population in central Mexico declined from 100 million last year to 78 million this year, due to late winter storms, coupled with cold and wet weather, and deforestration.

It's a sure sign of spring, through, when the monarchs return. It's a cause for celebration. Welcome back!

Meanwhile, we're anticipating the arrival of Christine Merlin, assistant professor in Texas A&M's Department of Biology, who will discuss her research on "The Monarch Butterfly Circadian Clock: from Clockwork Mechanisms to Control of Seasonal Migration" when she presents a seminar on Wednesday afternoon, May 31 at the University of California, Davis. The seminar is set from 4:10 p.m. to 5 p.m. in Room 122 of Briggs Hall. Host is molecular geneticist Joanna Chiu, associate professor and vice chair of the UC Davis Department of Entomology and Nematology.