Migratory
Undertaking epic seasonal journeys spanning thousands of kilometers to access rich feeding and breeding grounds.
Ruby-throated Hummingbird
A metabolic dynamo that can beat its wings more than 50 times a second and cross the Gulf of Mexico in a single non-stop flight.
Saiga Antelope
An inflatable nose, loud nasal roars, and an Ice Age survivor of the Eurasian steppe.
Sandhill Crane
A red-capped crane that duets with its mate and sleeps standing in the shallows.
Scalloped Hammerhead
A wide head that seems to sense prey no better than a sandbar shark's, but searches a wider area and can pivot into sharp turns at high speed.
Sockeye Salmon
A silver sea-going fish that turns bright red and swims back to the freshwater system where it hatched.
Swordfish
A fish with a heater for its brain and a flattened bill it apparently uses to slash prey.
West Indian Manatee
A gentle sea cow whose dense bones may help keep it neutrally buoyant, and whose weak low-frequency hearing may be part of why boats keep hitting it.
Western Grebe
Tied with Clark's grebe as the largest animal known to run on water, sprinting across a lake in a courtship display called rushing.
Yellowfin Tuna
A warm-muscled torpedo that can swim across an entire ocean.