International Beaver Day  Apr 7, 2026

International Beaver Day, celebrated on April 7, recognizes a hardworking little engineer quietly building a better world—one stick at a time. The beaver—buck-toothed, paddle-tailed, and famously industrious—has been reshaping freshwater landscapes for millions of years. With their iron-reinforced orange incisors, these skilled rodents cut down trees and build dams that slow the flow of water, improve its quality, and create wetlands that support a remarkable diversity of life. Their sturdy lodges, made of branches and mud, have underwater entrances that protect them from predators and keep their families safe.

© Andyworks/Getty Images

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