The Atlantic Coast, where wild and urban worlds intersect in unexpected ways. On North Carolina's Outer Banks, an aging stallion's battle to defend his family reveals the intense, unseen dramas of wild horse life. In Chesapeake Bay, rare footage captures bald eagles chasing ospreys mid-air for a hard-won meal. Beneath the waters of the "Graveyard of the Atlantic", sand tiger sharks act as unlikely guardians for schools of scad fish, a behavior only recently observed. In New York City, a young raccoon learns the challenges of urban survival in a vertical world, while under threat from predatory red-tailed hawks, something seldom seen before. In the Appalachian forests, young black bears forage and fireflies light up the darkness, and in New England, a 130-year-old red oak tree's preparation for winter is captured in stunning macro detail, revealing the intricate changes within its leaves.

Mexico, where deserts meet tropics. See new footage of fledgling pygmy owls, orca hunting, new species in flooded caves and orchid bees filmed in incredible detail - all revealing the hidden lives of unique wildlife.

The Wild West, where coyotes face a snowbound Yellowstone, rattlesnakes emerge in the hundreds, woodpeckers compete to store food, bison battle on the Great Plains and cranes gather in vast numbers on their age-old migration.

The Amazon, the largest rainforest on Earth; drone footage captures giant otters hunting together while black caimans prey on newly hatched turtles; a harpy eagle chick's first days in the canopy and army ants on the move reveal new behaviors.