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Wolf - Wikipedia
Wolf | Species & Facts | Britannica
Wolves - Facts, Diet & Habitat Information - Animal Corner
International Wolf Center
Wolves 101 | Nat Geo Wild - YouTube
Wolf | National Geographic
Wolf Biology and Behavior | International Wolf Center
Basic Wolf Info | International Wolf Center
Gray Wolf - Pictures, Facts, and Map - National Geographic Kids
Wolves Will Regain Federal Protection in Much of the U.S.