WWF works to sustain the natural world for the benefit of people and wildlife, collaborating with partners from local to global levels in nearly 100 countries.
More than 4,000 bison -- the largest land mammal in North America -- reside in Yellowstone National Park.
World Wildlife Fund
1250 24th Street, N.W.
Washington, DC 20037
World Wildlife Fund Inc. is a nonprofit, tax-exempt charitable organization (tax ID number 52-1693387) under Section 501(c)(3) of the Internal Revenue Code. Donations are tax-deductible as allowed by law.
© 2022 World Wildlife Fund. WWF® and ©1986 Panda Symbol are owned by WWF. All rights reserved.