Cacoxenus indagator

Cacoxenus indagator is a species of fruit fly^[1] native to central and southern Europe.^[2] It is a kleptoparasite, laying its eggs in the pollen-filled nest cells of mason bees.^[3] On account of its ability to break out of those cells once hatched, it is commonly known as the Houdini fly.^[4][5]

Cacoxenus indagator at a newly closed nest of Osmia cornuta

Houdini fly
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Diptera
Family:	Drosophilidae
Genus:	Cacoxenus
Species:	C. indagator
Binomial name
Cacoxenus indagator Loew, 1858[1]