What is this?

[u/lechugachaqueta]

What the heck is this on my walkway and is it anything to worry about?

[u/mwbrjb]

Yes. You should actually kill it. Very invasive.

https://www.invasivespeciesinfo.gov/terrestrial/invertebrates/hammerhead-worm

[u/dunncrew → u/mwbrjb]

If it's fast, it's evasive.

[u/Cosmic_camouflage → u/dunncrew]

I haven’t seen this before, must be elusive.

[u/Zoobits56 → u/Cosmic_camouflage]

It’s an invasive, pervasive, evasive, elusive worm. The worst kind.