• The Sentinel. Kenai Peninsula. Alaska.

    The Sentinel. Kenai Peninsula. Alaska.

    A bald eagle perched at dusk on upthrust ice in Alaska's Kenai Peninsula.

  • Snow Patrol. Mississippi River. Ilinois.

    Snow Patrol. Mississippi River. Ilinois.

    An adult bald eagle scans the Mississippi River in Illinois for fish during a January snowstorm.

  • The Acrobat. Kenai Peninsula. Alaska.

    The Acrobat. Kenai Peninsula. Alaska.

  • Bald Eagle with perch. Mississippi River. Iowa.

    Bald Eagle with perch. Mississippi River. Iowa.

  • Ice Landing. Kenai Peninsula. Alaska.

    Ice Landing. Kenai Peninsula. Alaska.

  • Bald Eagle above Mississippi River. Iowa.

    Bald Eagle above Mississippi River. Iowa.

    Late light shines on a mature bald eagle hunting above the Mississippi River in Iowa.

  • Sacred Forest. Bald Eagles along Mississippi River. Iowa.

    Sacred Forest. Bald Eagles along Mississippi River. Iowa.

    Bald eagles gathered to roost along the Mississippi River in Iowa.

  • Ospreys at nest. Indiana.

    Ospreys at nest. Indiana.

    A male osprey brings a fish to his mate at their nest on an Indiana lake.

  • Osprey returning to nest. Indiana.

    Osprey returning to nest. Indiana.

  • Ospreys on nest. Indiana.

    Ospreys on nest. Indiana.

  • Wood Duck. Ohio.

    Wood Duck. Ohio.

    A male wood duck swims among autumn reflections on an Ohio pond.

  • Belted Kingfisher diving for trout. Colorado.

    Belted Kingfisher diving for trout. Colorado.

  • Sandhill Cranes. Platte River, Nebraska.

    Sandhill Cranes. Platte River, Nebraska.

    Sandhill cranes roosting along the Platte River near Kearney, Nebraska.

  • Sandhill Cranes along Platte River. Nebraska.

    Sandhill Cranes along Platte River. Nebraska.

    Waves of sandhill cranes come to roost at sunset at Rowe Sanctuary along Nebraska's Platte River.

  • Sandhill Cranes. New Mexico.

    Sandhill Cranes. New Mexico.

    Sandhill cranes at Bosque del Apache National Wildlife Refuge leaving their marshy roost site in early morning light.

  • Sandhill cranes and shovelers. New Mexico.

    Sandhill cranes and shovelers. New Mexico.

    A brilliant sunset illuminates sandhill cranes and shovelers at Bosque del Apache NWR. New Mexico.

  • Sandhill Crane.New Mexico.

    Sandhill Crane.New Mexico.

    Adult sandhill crane in flight at Bosque del Apache NWR in New Mexico.

  • Snow Cloud. New Mexico.

    Snow Cloud. New Mexico.

    Snow geese swarm a field under threatening skies at Bosque del Apache NWR on a December morning.

  • Snow Geese. Bosque del Apache NWR. New Mexico.

    Snow Geese. Bosque del Apache NWR. New Mexico.

  • Sunrise Blastoff. Bosque del Apache NWR. New Mexico.

    Sunrise Blastoff. Bosque del Apache NWR. New Mexico.

    Snow geese take flight at New Mexico's Bosque del Apache NWR.

  • Greater Prairie-Chicken courtship display. Nebraska.

    Greater Prairie-Chicken courtship display. Nebraska.

    At sunrise in early April on a Nebraska tallgrass prairie, a male greater prairie-chicken performs its distinctive courtship dance.

  • Male geater prairie-chicken displaying on lek. Nebraska.

    Male geater prairie-chicken displaying on lek. Nebraska.

  • Fighting male Greater Prairie-Chickens. Nebraska.

    Fighting male Greater Prairie-Chickens. Nebraska.

  • Fighting male Greater Prairie-Chickens. Nebraska.

    Fighting male Greater Prairie-Chickens. Nebraska.

    Adult male Greater-Prairie Chickens battle for the attention of females on a lek in Nebraska.

  • Fighting Prairie-Chickens . Nebraska.

    Fighting Prairie-Chickens . Nebraska.

  • Greater Prairie Chicken. Nebraska.

    Greater Prairie Chicken. Nebraska.

    Male greater prairie-chicken on deer antlers.

  • Red Fox. Indiana.

    Red Fox. Indiana.

    A red fox pauses amongst spring wildflowers in a forest in suburban Indianapolis, Indiana.

  • Female Luna Moth on Mossy Rock. Indiana.

    Female Luna Moth on Mossy Rock. Indiana.

    A luna moth rests on a lichen-covered rock in Marion County, Indiana. June.

  • Onboard Dining. Common Loons. Michigan.

    Onboard Dining. Common Loons. Michigan.

    A Common Loon feeds its baby a crayfish on a lake in northern Michigan.

  • Turkey Vulture. Indiana.

    Turkey Vulture. Indiana.

    At sunrise, an adult turkey vulture spreads its wings to gather the warmth of the rising sun.

  • Muted Snowstorm. Prophetstown State Park. Indiana.

    Muted Snowstorm. Prophetstown State Park. Indiana.

  • Northern Cardinal . Indiana.

    Northern Cardinal . Indiana.

  • Northern Cardinal. Indiana.

    Northern Cardinal. Indiana.

  • Male Pileated Woodpecker. Indiana.

    Male Pileated Woodpecker. Indiana.

  • Pileated Woodpecker. Indiana.

    Pileated Woodpecker. Indiana.

  • Female Gyrfalcon. northeast Iceland.

    Female Gyrfalcon. northeast Iceland.

  • Peregrine Falcon. Indianapolis.

    Peregrine Falcon. Indianapolis.

    A peregrine falcon patrols its territory over downtown Indianapolis.

  • Golden Eagle. Roaring Fork Valley. Colorado.

    Golden Eagle. Roaring Fork Valley. Colorado.

    Female golden eagle with pine branch for nest. Colorado.

  • Barred Owl. Indiana.

    Barred Owl. Indiana.

  • Long Eared Owl. Indiana.

    Long Eared Owl. Indiana.

    Long eared owl, hunkered down during an Indiana snowstorm.

  • Madison Crossing

    Madison Crossing

  • Madison River Sunrise

    Madison River Sunrise

Nature