Anthomyiidae

After picking sixty (60!) snails off our little orange tree this morning, I noticed this handsome fly on one of the ravaged leaves. I am no entomologist, so the ID could be wrong. Looking at the distribution map in iNaturalist, Anthomyia species are far more common in the Southern Hemisphere than the northern, so possibly I’m way off. I was attracted to the strong dark dots on the wings; I suspect that are a key feature for identification.

Bombus vosnesenskii

According to iNaturalist, there are 24 species of bumblebees in California. The one that is busily pollinating our sage is the Yellow-faced Bumblebee. Bombus vosnesenskii is among the most common bee species on the West Coast of the United States, and the most common bumblebee from Oregon northward. The bee nests underground, usually in colonies of 200-300 workers.

Pieris rapae

The cabbage whites (Pieris rapae) are all over my brassicas, of course, but I’m also seeing them in the Park and on ornamentals in the neighbourhood. They seem to especially like purple lantana flowers. Do they also lay their eggs on the plant? Do their larvae eat the leaves, as they do my kale?

On the subject of lantana, it’s highly invasive where I‘m from. It covers an estimated four million hectares in eastern Australia, often to the exclusion of wildlife, people and livestock. So it’s taken me a long while to get used to seeing it as a cultivated garden plant here in Southern California.

Eat up, cabbage whites—lantana not kale!

Gyrinidae

Here’s something strange: the compound eyes of a whirligig beetle are divided into a higher part that is above water level when the beetle is floating passively, and a lower part that sits below water level. Gyrinidae are the only type of beetle with this feature.

The antennae are also unusual among beetles, being short and plump, and placed about at water level. 

Whirligigs get their common name from their habit of swimming rapidly in circles when alarmed. Adults carry an air bubble under the elytra at the tip of their abdomen, allowing them to breathe underwater. They are very social creatures, often found in large numbers swimming around on the water’s surface. There are about 700 species worldwide.