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A U.S. nonprofit group is working to restore the shortgrass prairie, where bison and their ecosystem could again thrive as they once did.

More than 300 species of birds live in or migrate throughout the shortgrass prairie here, nourished by a diversity of insects that may thrive in part by the ways that bison wallow.

Each autumn in southeast Colorado, hordes of fuzzy, fist-sized male tarantulas emerge from their burrows to scour the shortgrass prairie for mates.

Scientists, nature enthusiasts and that rare subspecies of humanity obsessed with spiders all come to witness something remarkable: hordes of fuzzy, fist-sized male tarantulas emerging from their burrows to scour the shortgrass prairie for mates.

The new expansion also will preserve what Haaland called one of the largest intact shortgrass prairie ecosystems within the National Park system.