The show features some animal misfits.
A journalist makes a trip back to Central and South America to check-up on the progression of a sloth named Velcro.
Killer whales make their to the Arctic during the summer, so that they can hunt in the open-water expanse.
The show features stories about bird behavior, intelligence and flight.
"The Nest" explores how birds carefully select their materials, and craft their homes for the all-important tasks of protecting their eggs and raising their young.
"Location, Location, Location" shows animated blueprints and tiny cameras that chart the building plans and progress of beavers, tortoises, hummingbirds and woodrats, examining layouts and cross sections as they evaluate the technical specs of their structures.
"Animal Cities" explores how some animals find that living in the midst of huge colonies of their own kind is sometimes a matter of necessity and sometimes the most secure and rewarding housing arrangement.