: Beavers use an oily secretion called castoreum from their scent glands to groom and waterproof their coats, allowing them to stay dry even while submerged for up to 15 minutes.
Beaver fur was the "gold rush" of the 17th and 18th centuries, fundamentally shaping the geography and economy of North America. beaver fur
: The underfur contains tiny barbs that allow the hairs to interlock, a property that made it the ideal material for high-quality felt. : Beavers use an oily secretion called castoreum
: A single postage-stamp-sized patch of beaver fur can contain upwards of 126,000 individual strands. Historical Significance: The "Furry Gold" : A single postage-stamp-sized patch of beaver fur
The effectiveness of beaver fur as a protective barrier comes from its complex anatomy:
: It consists of long, coarse, glossy "guard hairs" that repel water and a dense, short, fine underfur for warmth.