Decomposers are animals that eat dead animals or carcasses. They play an important role in an ecosystem by helping break down carcasses. Decomposers in the grassland ecosystem are earthworms, earwigs, fungi, algae, and insects.

Millipedes
Millipedes, BioKIDS, Kids' Inquiry of Diverse Species, Museum of Zoology University of Michigan, Discover what they look like, their habitat, how they communicate, what they eat, what eats them,
Helpful Fungus Among Us
Helpful Fungus Among Us, By Christine Engelbrecht, Plant Pathologist, Iowa State University Extension, Small photo with article on the importance of fungus.
Millipedes
Millipedes - Class Diplopoda By Phil Myers Animal Diversity Web University of Michigan Museum of Zoology Visit the web site for photos; click to enlarge.
The Adventures of Herman the Worm
The Adventures of Herman the Worm, University of Illinois Extension, Learn about the history, anatomy, what it eats, worm facts, and their importance in our soil.