Largest Land Mammal: American Bison. American bison typically reach 7 to 11 feet in length and weight 900 to 2,200 pounds. They feed primarily on grasses and can run nearly 30 miles an hour. Full-grown bulls stand 6 feet or more at the shoulder.

On stamps at 39 cents apiece of the Sheet are:
1) American alligator, largest reptile; 2) Moloka’i, highest sea cliffs; 3) Saguaro, tallest cactus; 4) Bering Glacier, largest glacier; 5) Great Sand Dunes, tallest dunes; 6) Chesapeake Bay, largest estuary; 7) Cliff Palace, largest cliff dwelling; 8) Crater Lake, deepest lake; 9) American bison, largest land mammal; 10) Off the Florida Keys, longest reef;
11) Pacific Crest Trail, longest hiking trail; 12) Gateway Arch, tallest man-made monument; 13) Appalachians, oldest mountains; 14) American lotus, largest flower; 15) Lake Superior, largest lake; 16) Pronghorn, fastest land animal; 17) Bristlecone pines, oldest trees; 18) Yosemite Falls, tallest waterfall; 19) Great Basin, largest desert; 20) Verrazano-Narrows Bridge, longest span;
21) Mount Washington, windiest place; 22) Grand Canyon, largest canyon; 23) American bullfrog, largest frog; 24) Oroville Dam, tallest dam; 25) Peregrine falcon, fastest bird; 26) Mississippi River Delta, largest delta; 27) Steamboat, tallest geyser; 28) Rainbow Bridge, largest natural bridge; 29) White sturgeon, largest freshwater fish; 30) Rocky Mountains, longest mountain chain;
31) Coast redwoods, tallest trees; 32) American beaver, largest rodent; 33) Mississippi-Missouri, longest river system; 34) Mount Wai’ale’ale, rainiest spot; 35) Kilauea, most active volcano; 36) Mammoth Cave, longest cave; 37) Blue whale, loudest animal; 38) Death Valley, hottest spot; 39) Cornish-Windsor Bridge, longest covered bridge; 40) Quaking aspen, largest plant.