Skip to content

We've been seeing a lot of bee flies in the genus Geron in our yard lately (link is to previous post).

Geron bee flies are more slender than most of their relatives and have a "humpbacked" appearance because their thorax bulges up in the back (dorsal surface).

 

As stated at BugGuide, the adults use their long, prominent proboscis to drink nectar from flowers. They seem to prefer sunflowers.

Because of their fuzzy bodies, they pick up pollen while feeding on nectar. When they carry the pollen to another flower, they help pollinate it.

So why were there so many of these flies on the palo verde tree this morning?

Looking closely, I noticed some caterpillars. Bee flies are parasites of other insects in general. Geron bee flies are parasites of caterpillars. These adults were probably looking for a caterpillar to lay their eggs on.

I'm going to spend some time watching the caterpillars to see if I can find out more. Look for an upcoming post about them.

Until then, do you have Geron bee flies in your yard? What flowers are they visiting?

What insects are on the zinnias this week?

assassin-bug-nymph-on-zinnia-bet0071

This little assassin bug nymph has orange spots that match the flower heads.

geron-flyon-zinnia0074

I doubt this Geron bee fly is fooled.

Getting outdoors is a great way to celebrate Earth Day.

Are you doing anything special for Earth Day today?

What sort of insect activity did the recent rains and high humidity bring out?

slender-bee-fly-geron1. A slender bee fly, genus Geron

moth-with-spots2. A brightly-marked moth, out in full daylight

snout-butterfly3. Yay, the snout butterflies are back!

Fall is the time when we usually have a lot of caterpillars. We'll have to see if this is a good year for them.