Mammal
Warm-blooded vertebrates possessing hair or fur, nursing young with milk, and possessing three inner ear bones.
Collared Peccary
A 15 to 28 kg hoofed mammal that is not a pig, with self-sharpening canine teeth and a scent gland above its tail.
Common Raccoon
The emo masked bandit whose touch-tuned forepaws do its foraging and whose cat-sized brain packs its neurons at near-primate density.
Common Vampire Bat
One of only three mammals that must feed on blood, it finds warm prey through heat-sensing pits on its face and crosses the ground on all fours to reach it.
Common Warthog
Tusked survivor that usually backs into a borrowed aardvark burrow, so its tusks face whatever comes calling.
Cougar
The solitary ghost cat of the Americas that can leap 40 feet in a single bound and purrs like a smaller cat.
Coypu
A webbed-footed marsh rodent with its eyes, ears and nostrils on top of its head.
Crabeater Seal
The Southern Ocean's most abundant seal, straining Antarctic krill through teeth called the most complex of any carnivore.
Dhole
A whistling, clucking wild dog that hunts in packs and can catch prey more than ten times its own weight.
Domestic Rabbit
Sees almost all the way around, twists in midair when happy, and eats its own droppings for a second pass at its food.
Domestic Yak
Oversized heart and lungs, a shaggy coat and a home up to 5,000 m high.
Donkey
A working equid whose hee-haw can travel up to 3 km, domesticated in Africa around 5000 BCE.
Dromedary
The desert animal that lets its body warm to 41.7 degrees Celsius instead of sweating as the day heats up.
Dugong
A sea cow that rips up seagrass with a flexible upper lip and may live more than 50 years.
Eastern Gray Squirrel
An eastern North American tree squirrel that has been known to dig empty cache holes when other squirrels are around, and now far outnumbers the native red squirrel in the UK.
Egyptian Mongoose
A snake-killer that dodges the strike on reflex and carries a receptor that resists one of the nerve toxins in cobra venom.
Elk
A bull's bugle is two sounds at once, and his antlers regrow every year at up to two-thirds of an inch a day.
Etruscan Shrew
One of the smallest mammals alive, with a heart that has beaten 1,511 times in a minute.
European Hare
Mom parks her furry newborns apart and makes the rounds to nurse them.
European Hedgehog
Around six thousand keratin spines, a back muscle that lets them all stand on end at once, and 1 to 2 km of travel a night.
European Mole
A velvety black digger that lives underground, in tunnel networks that can run hundreds of metres.
European Polecat
A masked mustelid that releases a strong-smelling secretion when threatened, grips so tenaciously it can be lifted by whatever is in its teeth, and seems held back from northern Sweden by snow.
Ferret
A domesticated weasel relative that spends over 60% of its time asleep in the lab.
Fisher
A fox-sized relative of weasels that climbs trees, hunts porcupines and whose females spend almost all of their adult lives pregnant or nursing.
Gaur
The largest living wild cattle, whose herds, one warden wrote, are prepared to stand and fight a tiger rather than run.