Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

National Moth Week photos of insects and people. Here's how to add your images.

Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Dances with an*ts - Leucopis

Dances with an*ts - Leucopis
Irvine Park, Orange, Orange County, California, USA
December 14, 2006
Size: ~5mm
This gutsy little fly would scoot away from aggressive argen*tine an*ts, then come right back to the center of the composite flower. She never flew off in the several minutes I was there, unlike other small flies which would have given up quickly. It's the first time I've seen one of these, and I hope to get better photos next time.

Images of this individual: tag all
Dances with an*ts - Leucopis Dances with ants - Leucopis Dances with ants - Leucopis

Moved from Chamaemyiidae.

That was quick!
Easy, too. Thanks, Hartmut.

Could be a Chamaemyiidae. The
Could be a Chamaemyiidae. They are looking for aphids and scale insects which are guarded by ants, that might be the reason why this little fly is not afraid of them... it is used to run away from ants...

Right. Family Chamaemyiidae.
Right. Family Chamaemyiidae. Genus Leucopis. Unfortunately, not identifiable to species from a photo (not many species of this genus are). And Martin was right, these flies are often laying eggs into ant-tended aphid colonies, and they are very adept at avoiding the ants.

Wow! Genus from a not-so-hot photo.
Thanks, Steve. Certainly an interesting little fly. There was a reference to Leucopis in one of my earlier posts, relating to the rather complex little environment that includes cochineal insects, wasps, and ladybird beetles on cacti. I've been keeping my eyes open for such flies on prickly pears; now I have a better idea of what to look for.

As you may have gathered, flies are my favorite subjects, and it's great to see more good people working on identities. Maybe we'll nail down all those cryptic bee flies and syrphids yet!

I posted similar one
Hello, Ron, do u think they are same?

Can't seem to find it, Daike
Can you give me a link or a Bug Guide page number? I'll try to help, but don't really remember this particular fly.

not that genus
somebody said.
But you can go for checking.

I would have thought it was different.
Shape of the wings and they way they're held. Or is that you?

Matthias Buck and Martin Hauser are among our top fly experts. Check their biographies by clicking on their names when they comment on a post.

Interesting info
Thanks, Martin.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.