Fig. 6. Nine small animals are responsible for the fertility of most forest soils. They include the wood louse (A), the oribatid mite (B), the termite (C), the springtail (D), the fly larva (E), the beetle larva (F), the millipede (G), the enchytraeid worm (H), and the earthworm (I). [From C. A. Edwards, "Soil Pollutants and Soil Animals." Copyright © 1969 by Scientific American, Inc. All rights reserved.]