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In Britain, it is primarily called the common earthworm or lob worm (though the name is also applied to a marine polychaete). In North America , the term nightcrawler (or vitalis ) is also used, and more specifically Canadian nightcrawler , referring to the fact that the large majority of these worms sold commercially (usually as fishing bait ...
The European nightcrawler (Dendrobaena hortensis) is a medium-small earthworm averaging about 1.5 g when fully grown. Generally blueish, pink-grey in color with a banded or striped appearance, the tips of their tails are often cream or pale yellow.
Lumbricus terrestris has several common names, including common earthworm, nightcrawler, and dew worm. It is strongly pigmented, brown-red dorsally, and yellowish ventrally. Setae are widely paired at both ends of the body.
One common way this species spreads is through the release of bait worms into the habitat. It is a "nightcrawler", an earthworm used as fishing bait, and one of several species sold in American bait shops as "red wigglers". [3] It can often be found in shipments of worms labelled as another species, such as Lumbricus terrestris or L. rubellus. [10]
Earthworms are shifting their ranges northwards into forests between 45° and 69° latitude in North America that have lacked native earthworms since the last ice age. [3] Of the 182 taxa of earthworms found in the United States and Canada, 60 (33%) are introduced species, these earthworm species are primarily from Europe and Asia.
In the tropics, the African nightcrawler Eudrilus eugeniae [70] and the Indian blue Perionyx excavatus are used. Earthworms are sold all over the world; the market is sizable. According to Doug Collicutt, "In 1980, 370 million worms were exported from Canada, with a Canadian export value of $13 million and an American retail value of $54 ...
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