A young coyote was feasting on a bison carcass and a bold raven swopped into the scene with hopes of reaping protein from the dead bison. Very cold temperatures and deep snow claims the lives of winter-weakened bison; predators like coyotes are one of the beneficiaries. An adult bison's weight ranges from a half-ton (1,000 pounds) up to a ton (2,000 pounds). A carcasses can be a substantial source of protein for predators and scavengers.
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