Herbivore
Feeding exclusively on vegetation, relying on specialized microbial fermentation to break down tough plant cellulose.
Pygmy Hippopotamus
Dwarf solitary forest hippo of the Upper Guinean swamps, with pink blood-sweat sunscreen.
Red Abalone
A one-shell snail relative that clamps onto rock with a muscular foot and builds mother-of-pearl 3000-fold tougher than the mineral it is mostly made of.
Red Deer
The UK's largest land mammal: a stag of up to 190 kg that regrows its antlers each year and roars through the autumn rut.
Red Kangaroo
Australia's biggest marsupial, hopping at 64 km/h on powerful hind legs, balanced by a tail it can also rest on.
Red Squirrel
Double-jointed canopy acrobat that cracks a nut in seconds and buries seeds that may grow into trees.
Reindeer (Caribou)
Eyes that shine deep blue in the Arctic winter, feet that click when it walks, and the only deer where cows grow antlers too.
Rock Hyrax
A stub-tailed, rabbit-like rock climber with singing males, whose closest living relatives are elephants and manatees.
Saiga Antelope
An inflatable nose, loud nasal roars, and an Ice Age survivor of the Eurasian steppe.
Silkworm
A caterpillar that grows thousands of times heavier in a month, then wraps itself in one silk thread up to 1,800 metres long.
Spotted Lanternfly
A planthopper, not a moth, that turns red as it stocks up on its host tree's chemical defences.
Springbok
A gazelle-like antelope that bounces on stiff legs and flares a hidden crest of white hair.
Suffolk Sheep
A jet-black, wool-free head and legs against a clean white fleece, on an English meat breed whose lambs can gain more than a pound a day.
Sunda Colugo
Southeast Asian mammal with a furred gliding membrane from neck to fingers, toes and tail, carrying it up to 100 metres with little height loss.
Three-Toed Sloth
A slow-metabolism canopy dweller whose fur hosts its own community of moths and algae.
Water Buffalo
A farm giant that can reach 1,000 kg and wallows in mud to cool off.
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 Honeybee
A forager who dances flower coordinates with her whole body, and dies giving her sting.
White Rhinoceros
1,800 to 2,700 kilograms of armored grey hide and a keratin horn, carrying a name nobody has ever actually proven right.
White-Tailed Deer
A fawn holds in its waste until its mother returns, and she swallows whatever it passes so predators find no sign of it.
Yellow-Footed Rock-Wallaby
Ring-tailed outback acrobat that leaps up to four metres from rock to rock on short-clawed, thickly padded hind feet.