Found several on an indoor staircase, apparently same species. Some dead, some alive.
Mating pair of hoverflies on a dandelion bloom. Not certain on the ID.
San Diego County, California, US
Stratiomyidae: Benhamyia straznitzkii - Soldier Fly
Characteristic head down position on tree trunk.
True flies are insects of the order Diptera (from the Greek di = two, and ptera = wings). Their most obvious distinction from other orders of insects is that a typical fly possesses a pair of flight wings on the mesothorax and a pair of halteres, derived from the hind wings, on the metathorax. (Some species of flies are exceptional in that they are secondarily flightless). The only other order of insects bearing two true, functional...