Are composting worms - Earthworms?
The worms you need for domestic composting are still earthworms but are often termed surface litter worms: These include Eisenia Foetida (Tiger Worms), Eisenia Andrei or, Eisenia Hortensis (often known as a Dendrabaena Veneta) They are all reddy brown in colour and they live in the soil in the surface layer of decaying vegetation.
You will find them naturally on the floor of a forest or they often migrate into your compost heap. They are all UK native species of Earthworms.