Earthworm - Soil Ecology Wiki

The Soil Biota Learn Science at Scitable

Eisenia fetida - Wikipedia

Worms love earth - Earthworms & their soil: Octolasion lacteum

Smithsonian Insider – Earthworms to blame for decline of Ovenbirds

The three main ecological groups of earthworms. Earthworms differ

Earthworms: The Invasive Species You Didn't Know About - Upper

Earthworm, PermaWiki

Earthworm, PermaWiki

Earthworms

Earthworm - Soil Ecology Wiki

Earthworm Animal Facts Lumbricina - A-Z Animals