Hello everyone. I came home from a weekend away to find a strange flat worm slug thing on my wall. Could it be a kind of ... flatworm? On closer inspection, I found two more loitering just inside my window. They were about 1cm long, I'd say. My window was ajar, and I have a lot of ivy growing just outside, but I'm up on the first floor.
Also I noticed this particularly vile-looking black goo oozing out of the end of it's... spine / gut... thing.
I must say I found these critters to be quite horrible, so I was wondering what they are!
I came across these pages that claim it's an Epistrophe eligans larva:
Brilliant! Thank you all very much!
How strange that this slimey wrinkled thingamy turns into a hoverfly.