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Hammerhead Worm

Bipalium sp.


Size of large worm. Brownish in color with half moon shaped head


Crawling out of woody area after heavy rains


It attacked and killed an earth worm

1 Species ID Suggestions

Liam 8 years ago
Hammerhead Worm
Bipalium sp. Bipalium

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Scott Frazier
Scott Frazier 8 years ago

Moved to "other" organisms :-)

Hema  Shah
Hema Shah 8 years ago


I actually spotted this creature at the school where I work. I was observing him with two students and it attacked and killed an earthworm that was on the sidewalk. Thank you for the helpful information. I will definitely make sure that these creatures do not make a home in my garden.

MrsPbio 8 years ago

Also called a Land Planarian, this flatworm species is one you DO NOT WANT in your garden! It's an invasive alien, and preys on your beneficial native earthworms. If you have a worm bin or vermicomposting system, it's a living nightmare. One planarian like this in your bin can destroy your entire composting worm colony in a matter of days. I don't usually recommend destroying living things, but this is one organism I make an exception for! (I do have a worm bin....)

Louisiana, USA

Spotted on Apr 14, 2013
Submitted on Apr 15, 2013

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