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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. When the species has not been feeding, it is pale pink.
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 ...
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.
Thus each worm becomes the genetic father of some of their offspring (due to its own sperm transferred to other earthworm) and the genetic mother (offsprings from its own egg cells) of the rest. As the worm slips out of the ring, the ends of the cocoon seal to form a vaguely onion-shaped incubator in which the embryonic worms develop. Hence ...
Nightcrawler, any large earthworm, especially those favored in angling Lumbricus terrestris, a globally-distributed species of earthworm, known in North America as nightcrawler or Canadian nightcrawler; Eudrilus eugeniae, the African night crawler, native to tropical West Africa; European nightcrawler, Eisenia hortensis
Large mammals develop at an absolute slower rate compared to small mammals. Thus, the large mammal tend have longer gestation periods than small mammal as they tend to produce larger neonate. [ 18 ] Large mammals require a longer period of time to attain any proportion of adult mass compared to small mammals.
The species has a high rate of reproduction, and can complete its life cycle in 75 days. [5] There are morphs that reproduce sexually and by parthenogenesis, producing young without fertilization. [1] While the worms themselves are sensitive to cold temperatures, the cocoons are very cold-hardy. They can stay viable over the winter in ...
Eudrilus eugeniae, also called the "African nightcrawler", is an earthworm species native to tropical west Africa and now widespread in warm regions under vermicompost; it is an excellent source of protein and has great pharmaceutical potential.