Fishermen often bait their hooks with nightcrawlers, or Lumbricus terrestris. These large earthworms can grow to 10 inches long. Children who fish often use smaller, young nightcrawlers, called dillies.
Dillies are about 2 to 4 inches in length, while Canadian nightcrawlers used as bait usually run 5 to 8 inches.
Dillies (also known as dillys) are used to catch trout, sunfish and bluegills, while nightcrawlers can be used to catch these and catfish and pike as well.
Often called Canadian nightcrawlers, Lumbricus terrestris can be picked off fields and lawns in the northeastern United States. Night pickers harvest them commercially in Ontario, Canada.
Nightcrawlers typically cost between $2.50 and $3.50 per dozen, while a cup of 15 dillies might run the same.
Canada exports about $20 million worth of nightcrawlers to the United States annually.
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