Our Canadian crawlers are healthy, big, and ready to use for all types of anglers. Canadian Nightcrawlers make excellent live bait for all types of fish as well as food for birds, chickens, amphibians, and reptiles. These worms range in length from 3 1/2 to 6 inches and have the diameter of a pencil. Canadian Nightcrawlers are cold-weather worms that should be kept refrigerated between 40 and 50 degrees Fahrenheit. They are not composting worms, and they do not reproduce quickly.