Most beavers are born between May and early July, weighing one pound and measuring a foot long. They are fully furred, their eyes and ears are open and they know how to swim. Even so, they don’t usually venture out of the lodge for the first month or so. Initially their fur isn’t water-repellent, but by three to four weeks of age, the young beavers’ anal glands, used in greasing their fur, are functional. When the kits weigh seven or eight pounds, they start to leave the lodge regularly to explore their pond and feed with their parents and older siblings.
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