h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

The toe nail clipping nixie is a particularly odious little creature, but fascinating none-the-less. They live in bathrooms and pinch the toe nail clippings from the bin in order to strew them around the carpet so you get horrible sharp slivers in your feet when you next walk in. The reason they are so fascinating is that they demonstrate the evolutionary process on a very rapid scale. Back in Victorian times these nixies were all white, not like a person is white, but pure white with an interesting enamel finish, in order to be properly camouflaged in the bathrooms. Of course in modern times bathrooms come in all sorts of colours, and so the nixie has been forced to evolve. There are now whole tribes of peach nixies, blue nixies and green nixies as well as the more old fashioned white variety. But the rarest nixie is the "travelling chameleon nixie". Unlike his more staid fellows, who are happy to spend their entire lives in one bathroom, this tribe is nomadic in nature, and so has developed the ability to change colour, in order that it may visit all the bathrooms in the neighbourhood.

They also take the lid off the toothpaste and jump up and down in the middle of the tube in order to cause arguments and break up marriages!

Gargoyle

Thanks, I'll add it to the page. I've always wondered where the clippings came from.