A mammal may weigh as little as 1/12 ounce, as do some shrews, or as much as 150 tons, like the blue whale. It may spring, waddle, swim, or even fly. But if it has milk for its young, has hair of some kind, is relatively intelligent, and has warm blood, then it is a mammal.
Requirements & Worksheets
Complete details and worksheets for this merit badge are available here.
Requirements 3C & 4F MUST be completed before you attend your merit badge day class. Failure to do so may prevent you from completing your merit badge.