August 10, 2016
We have written before about bird louse flies (hippoboscids), but I never get tired of their flat, creepy look. Recently, our ornithology collections manager, Kimball Garrett, contacted me and said "Hey, Brian, are you interested in some hippoboscids from a least bittern (Ixobrychus exilis) from Malibu",- of course I was, what an unusual host from which to get hippos (what us entomologists endearingly call them)!
Let me note here that although they are called "bird louse flies, they are actually more like fleas, with the ability to easily move from one host to another (unlike their wingless, more sedentary namesakes). They feed on the blood of their bird "hosts".
Anyway, keying them out with my trusty "Manual of Nearctic Diptera", I came easily to the name Ornithoica, of which there were supposed to be two North American species. Intrigued enough to continue further, I looked up the latest key to species (which was from 1966!) and confirmed that the 5 flies all belonged to the species Ornithoica confluenta, known only from South America, the Caribbean, and southern Florida. At least, that was their known distribution in 1966; things might have changed, but it is undoubtedly a rare record!
(Photos by Kelsey Bailey)