It was really warm and rainy that day. Just as it stopped raining, I went on a walk and found this flatworm. It's very unlike the hammerheads I'm more familiar with.
In the picture, it's moving in the direction of the viewer, with the thin part becoming thinner as it stretches forward.
The slug in the photo with the Bipalium is Arion hortensis complex.
This is the first actual land planarian I have ever seen! There were numerous others on the ground in the same area, also. I have a guess of what species it might be, based on a bunch of Google searches, but I am not very experienced with Platyhelminthes, so I will not be certain: Dolichoplana striata
Pseudoceros sp.11 flatworm
The flatworms, known in scientific literature as Platyhelminthes or Plathelminthes (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning worm) are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrate animals. Unlike other bilaterians, they have no body cavity, and no specialized circulatory and respiratory organs, which restricts them to having flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion. The digestive cavity has only one opening...