An increasingly fragmented landscape is creating problems for the fleet-footed creature.
Male sage-grouse gather in groups to compete for females.
The nubian ibex, a desert-dwelling goat, can scale near vertical cliffs.
In order to survive he must depend on the generosity of his other family members.
Two snub-nosed monkey brothers play in the tree tops, annoying the rest of the troop.
How puffins got their close-up in NATURE "Animal Homes".
Puffins search for the perfect piece of real estate where they can raise their young.
A spider found in the Caribbean and South America build nests more than 20 feet across.
A female Anna's hummingbird builds a nest constructed of plant fibers and spiderwebs.
Merganser ducklings brave the 50-foot drop from their nest to the forest floor
See how a key scene in NATURE's "Animal Homes" was filmed.
Baby orangutans sometimes need a little help when swinging from tree to tree.