The purpose of a letter of attestation is to confirm or acknowledge an action, statement or behavior. As such, it takes the format and layout of an official letter, but with a few modifications. Basically, the sender is attesting to the knowledge and awareness of a particular situation.
Some consider L.rubellus to be the true red worm. It is also called the dung worm, or red marsh worm. This worm loves manure and compost piles but has also been found working the earth which makes it doubly effective as the two other worm varieties stay mostly at the surface of the soil.
Worms have tiny mouths and will take extremely small bits out of things like bacteria, fungi and protozoa. The love organic matter such as plants, fruit, compost heaps of cut grass, potato peelings and decaying animals. When the food is too large for their mouths they moisten it to make it soft and suck it in.