Mammals

Warm-blooded vertebrates that nurse their young with milk and typically give birth to live offspring. All mammals have hair or fur at some stage of life and breathe air through lungs.

Amur Tiger Among Blooming Rhododendrons

Amur Tiger Among Blooming Rhododendrons

A rare encounter on the slopes of the Russian Far East

Tibetan Fox: The Square-Faced Hunter of the Highlands

Tibetan Fox: The Square-Faced Hunter of the Highlands

A master of the plateau with looks as distinctive as its strategy

The Smallest Reindeer in the World

The Smallest Reindeer in the World

Svalbard's tiny wonder that survives on seaweed

Why the Quokka Is Called the Happiest Animal on Earth

Why the Quokka Is Called the Happiest Animal on Earth

A closer look at the life and charm of an extraordinary marsupial

The Social Life of the Southern Hairy-nosed Wombat

The Social Life of the Southern Hairy-nosed Wombat

A heat-hardened marsupial sharing warrens in the outback

American Bison in Winter: Surviving the Deep Freeze

American Bison in Winter: Surviving the Deep Freeze

What it takes to endure the cold on the open range

Do Cheetah Cubs Mimic Honey Badgers?

Do Cheetah Cubs Mimic Honey Badgers?

How looking like a fearless fighter could help cubs stay alive

Jaguarundi: The Elusive "Otter Cat" of the Americas

Jaguarundi: The Elusive "Otter Cat" of the Americas

A rare glimpse into one of the most mysterious wild cats

Up Close with the Black Eastern Quoll

Up Close with the Black Eastern Quoll

Inside the life of a rare dark form of this Tasmanian predator

The Malayan Tapir’s Life in Black and White

The Malayan Tapir’s Life in Black and White

A closer look at how this elusive rainforest giant moves, feeds, and survives

Gelada: The Only Grass-Eating Primate on Earth

Gelada: The Only Grass-Eating Primate on Earth

Ethiopia’s primate that displays a red chest and flashes its gums

Lion Cubs Feed on a Zebra Carcass

Lion Cubs Feed on a Zebra Carcass

A closer look at how mealtime shapes a cub’s future

Wolves and Ravens: An Unlikely Ecological Partnership

Wolves and Ravens: An Unlikely Ecological Partnership

How a predator and a scavenger built one of nature’s most fascinating alliances

Okapi Looks Part Zebra, Part Giraffe

Okapi Looks Part Zebra, Part Giraffe

The only living relative of the giraffe, perfectly adapted to life in the Congo rainforest.

Meet the Wombat: The Toughest Digger Down Under

Meet the Wombat: The Toughest Digger Down Under

This sturdy Australian burrower digs vast tunnels, defends itself with an armored rear, and even produces cube-shaped droppings.

Meet the Aardvark: Africa’s One-of-a-Kind Night Digger

Meet the Aardvark: Africa’s One-of-a-Kind Night Digger

With rabbit ears, a pig-like snout, and a termite diet, this odd survivor is unlike any other mammal

The Emperor Tamarin: A Monkey with a Regal Moustache

The Emperor Tamarin: A Monkey with a Regal Moustache

Small in size but commanding in presence, this tamarin reshapes life high in the rainforest

Mountain Goats: Masters of the High Peaks

Mountain Goats: Masters of the High Peaks

How sure-footed climbers survive cliffs, cold, and predators in North America’s alpine heights

Sun Bears: Smallest of All Bears

Sun Bears: Smallest of All Bears

From tree nests to ten-inch tongues, a closer look at a hidden species

Slow Loris: The World’s Only Venomous Primate

Slow Loris: The World’s Only Venomous Primate

The bite, the biology, and the surprising reasons they use it

Tiger Quoll: The Spotted-tailed Predator of Australia

Tiger Quoll: The Spotted-tailed Predator of Australia

A pouch-raised, nocturnal hunter

Fossa: Madagascar’s Largest Terrestrial Predator

Fossa: Madagascar’s Largest Terrestrial Predator

How a mongoose relative rules the forest from canopy to ground

Busy Beavers: Inside the World of Master Builders

Busy Beavers: Inside the World of Master Builders

How dams and lodges reshape streams, create wetlands, and boost biodiversity

The Serious Side of Play in Young Mammals

The Serious Side of Play in Young Mammals

How play shapes brain development, confidence, and social skills

A Stoat Invader on Chalky Island: One Predator, an Eight-Month Hunt

A Stoat Invader on Chalky Island: One Predator, an Eight-Month Hunt

The effort to track down a single stoat threatening one of New Zealand’s predator-free sanctuaries