The one that we found in our yard is a Land Planarian. Here is a picture of the exact one we found. Perhaps this is your worm too? http://www.floridanature.org/species.asp?species=Bipalium_kewense
where did you see them I see the occasional one in my bathroom washbasin or bath. Some are more orangey white, but they are less than 1cm long and have a distinctly black tip and they move by arching and extending rather than wriggling. Are they a Human parasite or do they hatch in the waste pipe or something?
It is called a hammerhead worm. They can grow 20 inches long, and they eat earth worms. They are native to Asia, and if you cut them you just make more of them. They react like a slug to salt so to kill them melt them away with salt.
There are a few different caterpillars that have black and white stripes and a head . Two of these are the caterpillars of the Hieroglyphic Moth and the Beautiful Tiger Moth.
black worm with white stripe
A unusual one. I dont think they exist.
tape worm
tangari
Spiderman's Uncle
Sea Kraits are white with black stripes. Or black with white stripes if you like to look at it that way.They're a sea snake, highly venomous, but only aggressive when provoked repeatedly.King snakes are also black and white, striped. They are non-venomous, land based and eat other snakes.Hope this helped!
the worst kind
If the stripes are light in color, maybe even off white it could be a CA king snake.
a scary one
Black wido
The kind of spider that is large 3 inches black and fuzzy with white stripes and found in the Bahamas is a tarantula. These tend to hide most of the time, but they may come out when it rains or if they are disturbed.
molly birds are gray and they are very sassy
Most catilppilars are green with black stripes but you may be looking at a Crossstriped Cabbageworm.
its rattler..
the mama bee
It's probably the violin spider. That's just a guess.