red earthworm in a hole in the ground under the stump of an old tree, ukraine

animal earth earthworms earthworm red hole ground stump tree soil burrow tunnel moist dark roots decay organic nutrients decomposer habitat forest invertebrate underground wriggle damp nature ecosystem recycle hidden humus shelter mulch fungus detritus soildweller subterranean crawl moisture burrower soilaerator worm hiddenlife soilhealth tunneldweller wriggler organicmatter