Bug Squad

Migrating monarchs are fluttering daily into our yard in Vacaville, Calif., one by one, two by two, three by three, and four by four, for a little flight fuel. They're sipping nectar from the Mexican sunflower, Tithonia rotundifolia, and tropical milkweed, Asclepias curassavica.

If you're addicted to insects or insect photography, you'll want to see the international award-winning images on the Insect Salon website. Each year the Peoria (Ill.) Camera Club hosts the contest in conjunction with the Entomological Society of America (ESA).

In case you missed it, today was National Pumpkin Day. But it ought to be National Squash Bee Day, because the squash bee (my favorite species is Peponapis pruinosa) is an important pollinator of squash and pumpkins. A little bit about the squash bees: Squash bees are specialists; not generalists.

So tiny and so destructive. It's about the size of a grain of rice but it's a killer. That's the walnut twig beetle, Pityophthorus juglandis, which in association with a newly described fungus, Geosmithia morbida, causes thousand cankers disease, wreaking havoc on native black walnut trees.

What an interesting and innovative title: "The Ecoinformatics and the Curious Case of Katydids in California Citrus." That's what postdoctoral scholar Bodil Cass of the Jay Rosenheim lab, University of California, Davis, will discuss at her seminar from 4:10 to 5 p.m., Wednesday, Oct.