Earthworms are the world's unsung heros. They loosen and mix up the soil, break down and recycle decaying plant matter and fertilise the soil by bringing nutrients closer to the surface. Birds often rely upon worms as a primary source of food. Because earthworms breathe through their skin, they have to come to the surface when it rains or risk drowning. Famously hermaphroditic, earthworms are both male and female in one body, though it still takes two worms to reproduce. Earthworms range in length from a tiny one millimetre to a massive three metres.
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Worm charming
Blackbirds use vibration to attract worms to the surface.
Blackbirds use vibration to attract worms to the surface.
Snake-sized worm
Steve Backshall comes across the biggest earthworm he's ever seen.
Steve Backshall comes across the biggest earthworm he's ever seen.
Mating earthworms
Infra-red filming sheds light on earthworms as they get together to mate.
Infra-red filming sheds light on earthworms as they get together to mate.
Discover what these behaviours are and how different plants and animals use them.
Additional data source: Animal Diversity Web
The Lumbricidae is a family of earthworms which includes most of the earthworm species well known to Europeans. About 33 lumbricid species have become naturalized around the world, but the bulk of the species are in Holarctic: from Canada (e.g. Bimastos lawrenceae on Vancouver Island) and the United States (e.g. Eisenoides carolinensis, Eisenoides lonnbergi and most Bimastos spp.) and throughout Eurasia to Japan (e.g. Eisenia japonica, E. koreana and Helodrilus hachiojii). An enigmatic species in Tasmania is Eophila eti. There are currently 670 valid (sub-)species in about 42 recognized genera.
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