Entomophthora muscae

There are several groups of pathogenic fungi which specialize in insects, Cordyceps being the first which springs to mind. In the UK, Entomophthora muscae is not uncomon, with outbreaks of infection tending to occur in the spring and autumn. I found several of these infected flies (Scathophaga stercoraria?) at the weekend, all lying on Broad-leaved Dock leaves waiting to disperse their spores to passers-by.