Eastern Forest/Boreal Transition Eastern Forest/Boreal Transition Sierra Madre Oriental pine-oak forests Sierra Madre Oriental pine-oak forests Sierra Madre Oriental pine-oak forests Tamaulipan mezquital Edwards Plateau savanna Texas blackland prairies Texas blackland prairies East Central Texas forests Piney Woods forests Western Gulf coastal grasslands Western Gulf coastal grasslands Western Gulf coastal grasslands Western Gulf coastal grasslands Western Gulf coastal grasslands Western Gulf coastal grasslands Western Gulf coastal grasslands Canadian Aspen forests and parklands Canadian Aspen forests and parklands Northern tall grasslands Allegheny Highlands forests Eastern Great Lakes lowland forests Eastern Great Lakes lowland forests Eastern Great Lakes lowland forests Eastern Great Lakes lowland forests Ozark Mountain forests Florida Sand Pine Scrub Florida Sand Pine Scrub Florida Sand Pine Scrub Florida Sand Pine Scrub Florida Sand Pine Scrub Florida Sand Pine Scrub Florida Sand Pine Scrub Florida Sand Pine Scrub Florida Sand Pine Scrub Northeastern Coastal Forests Northeastern Coastal Forests Northeastern Coastal Forests Northeastern Coastal Forests Northern Mixed Grasslands Nebraska Sand Hills Mixed Grasslands Atlantic coastal pine barrens Atlantic coastal pine barrens Atlantic coastal pine barrens Atlantic coastal pine barrens Atlantic coastal pine barrens Atlantic coastal pine barrens Atlantic coastal pine barrens Atlantic coastal pine barrens Western Great Lakes forests Western Great Lakes forests Western Great Lakes forests Western Great Lakes forests Western Great Lakes forests Southeastern mixed forests Central Canadian Shield forests Upper Midwest forest-savanna transition Upper Midwest forest-savanna transition Upper Midwest forest-savanna transition Upper Midwest forest-savanna transition Upper Midwest forest-savanna transition Central tall grasslands Central and Southern mixed grasslands Central and Southern mixed grasslands Central and Southern mixed grasslands Appalachian mixed mesophytic forests Appalachian mixed mesophytic forests Appalachian mixed mesophytic forests South Florida Rocklands South Florida Rocklands Western Short Grasslands Western Short Grasslands Northwestern Mixed Grasslands Flint Hills Tall Grassland Central Forest/Grassland Transition Zone Central Forest/Grassland Transition Zone Southeastern Conifer Forests Middle Atlantic Coastal Forests Middle Atlantic Coastal Forests Middle Atlantic Coastal Forests Middle Atlantic Coastal Forests Middle Atlantic Coastal Forests Middle Atlantic Coastal Forests Southern Great Lakes Forests Southern Great Lakes Forests New England/Acadian Forests New England/Acadian Forests New England/Acadian Forests Mississippi Lowland Forests Everglades Appalachian/Blue Ridge Forests Appalachian/Blue Ridge Forests Central U.S. Hardwood Forests Central U.S. Hardwood Forests