BUTTERWORMS ARE NUTRITIOUS, EASY CARE (STORE THE REFRIGERATOR, NO FEEDINGS REQUIRED!); THEY ALSO MAKE GREAT FISHING BAIT!! Butterworms average about 3/4" to 1" (vary in length from 1/2" to 1-1/4"), are similar to a caterpillar, but are fatter and smooth to touch, like Waxworms. **The Calcium content is twice that of any other feeder insect Nutritional Information Moisture 58.54 Ash 1.04 Protein 16.20 Fat 5.21 Calories/Fat 87.73 Calcium (ml/100 grs) 42.90** Butterworms are shipped in wheat bran, for bedding material and to absorb moisture. The Butterworm may eat a little while stored. They can be stored in the refrigerator at temperatures of 38-42 degrees F. Butterworms can be stored in the refrigerator for 1 to 2 months with minimal loss. Butterworms are a little more expensive than Silkworms BUT they have the advantage of being able to be stored for extended periods of time in the refrigerator. http://www.carolinapetsupply.com/catalog/index.php?main_page=index&cPath=60