Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It only takes a minute to sign up.
Sign up to join this community
I've been living in Jamaica 25 years now and never seen something like this until recently they started popping up around my house at nights by the dozens. They appear to be blackish purple or maybe just black (I think my light has something to do with it), but I recall seeing a grey one once and longest one I've seen so far is about 3 inches long.
It looks like a terrestrial ribbon worm.
Nemertean worms are not leeches, but a different group of worms. Most are marine but there are a few terrestrial ones. This depicted worm is from Borneo and other terrestrial nemertean worms are from South Asia also. But I have read that these can stow away in plants and are turning up in other parts of the world. I found some small ones in San Diego that I thought were terrestrial leeches but were nemertean worms.
I would be very curious where you are in the world that big ribbon worms are partying in your yard.
