
06/22/2025
To the bee-mimic robber fly (Laphria grossa): thank you for helping do my dirty work 🫡
For those of you who aren't familiar with your invasive species, that coppery morsel in the voracious embrace of this seeming bumbler is a Japanese beetle (Popilia japonica). They are an absolute SCOURGE in both the garden and the field, owing to 1) their seemingly insatiable appetite, and 2) the fact that almost nothing around here actually eats them.
Well, enter the humble robber fly, so named for its skill in seizing other insects right out of the air. They monitor their surroundings from a perch and fly out to catch them; when successful, they return to a sheltered spot to leisurely dissolve their prey's insides with their saliva and slurp slurp slurp up the resulting bug innard slurry through their oh so stabby face. Scrumptious!
Many of the details of their early life are still mysterious, as their larvae occupy rotting logs and are thus quite difficult to observe. As adults, though, they are truly iconic, 100% beneficial, and tragically ephemeral, as once they reach the flying phase they generally only have between two to four weeks to live.
Well, my handsome yard guard, however long you've got, I hope not a single swoop is wasted.
If you'd like to know even more about their life history, there's a page devoted entirely to them: check out http://www.laphriini.com/