I found this in our bathroom. It looks like a fly, but has vestigial wings and what looks like piercing mouthparts. It cleans its legs like a fly. Its body is quite flat, and from head to 'tail' is about 7mm. It looks a bit sinister to me! I'd quite like to know what it is, so if you have any idea, let me know...
This is a flat-fly or hippoboscid fly (Diptera: Hippoboscidae) which are external parasites of birds and bats.
In my experience the commonest species found in homes is Crataerina hirundinis which is a parasite of housemartins and swallows.
They have been known to bite people but we cant sustain them in manner to which they are accustomed to by their natural hosts.
Creepy looking flies - but in a funky kind of way.
I have certainly seen males of some flying, albeit weakly, but they have more fully formed wings. Not sure if this is the case in all species but pretty sure that it is the females who have reduced wings and are somewhat tied to their host.
Anyone else know? Otherwise I will do a bit of reading and report back.