As we move into the bison mating season (the rut) groups of bison will be at their largest. Give wildlife the right of way when they cross the road, stay inside your vehicle, and use pull-outs when you stop for photos. #YellowstonePledge | Yellowstone National Park

516K views · 10K reactions | The bison breeding season (or rut) has begun, and you can actually see the fur fly! Males will fight for dominance and the chance to breed females. During the rut, males may go head-to-head in aggressive forms of bison socialization: head-butting, shoving, sizing up, and long stares. Ultimately, it will be the females who choose their mates.  Video credit: Mallory Beckman, Crane Trust Range Technician | Crane Trust | Facebook

Sound on to hear bison bellows! 🔊 Mating season is in full swing at Neal Smith National Wildlife Refuge in Iowa. Bison bulls compete for a chance to mate, making deep vocalizations that echo across the prairie. 🎥 Nancy Corona/USFWS | U.S. Fish and Wildlife Service