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

Fall Fund Drive

TaxonomyBrowseInfoImagesLinksBooksData
Photo#331195
Tachnid? and caterpillar - Cucullia convexipennis

Tachnid? and caterpillar - Cucullia convexipennis
Toronto, Southern Ontario, Ontario, Canada
September 9, 2009
I saw the caterpillar first, then noticed a fly hanging around "suspiciously", first thinking it was a housefly. It stayed to the rear of the caterpillar most of the time, then eventually approached it from the side, curling it's abdomen underneath itself. I then recalled reading that Tachnid flies parasitize caterpillars and figured this is what I was observing. Couldn't get as may good shots as I wanted, but here are 2 that seem to show what's going in.

Images of this individual: tag all
Tachnid? and caterpillar - Cucullia convexipennis Tachnid? and caterpillar - Cucullia convexipennis

And completing the cycle...
Here is a tachinid I reared from a brown-hooded owlet caterpillar 8 years ago:

Moved

Moved
Moved from ID Request.

Excellent observation and shot!
Last year I took a pic of the Brown Hooded Owlet caterpillar with two eggs attached. Although I do not know if these a fly- or other eggs, my picture complements yours:

 
the eggs look familiar
the eggs on your image look familiar to the ones I saw -- about 8 altogether -- so yes, those are "the" eggs

 
I second that!
I second the compliments on the images and your powers of observation. Nice commentary, too. Thanks for sharing! Oh, yes, that would be a tachinid fly.

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