Golden Lion Tamarin
Golden lion tamarins fell to about 200 in the wild in the 1970s; thanks to reintroduction and forest restoration, there are now several thousand.
Mammal
Golden Snub-nosed Monkey
Golden snub-nosed monkeys live in snowy mountain forests and survive winter mainly by eating lichens.
Gray Whale
A female gray whale tracked by satellite swam about 22,500 km in a single round trip, one of the longest migrations recorded for any mammal.
Greater Bilby
In Australia, chocolate ‘Easter bilbies’ are sold instead of Easter bunnies to raise awareness of this threatened native animal.
Greater Kudu
A male greater kudu’s spiral horns can reach about 1.8 metres along the curve, with two and a half graceful twists.
Greater One-horned Rhinoceros
Numbers have risen from fewer than 200 in the early twentieth century to more than 4,000 today, one of Asia’s greatest conservation recoveries.
Grevy’s Zebra
Grevy’s zebra is the largest wild horse in the world, with narrower stripes, a white belly and big, round ears.
Grey Wolf
A wolf pack can travel over 50 km in a day, and dispersing young wolves have walked more than 1,000 km to find new territories.
Ground Pangolin
When threatened, a ground pangolin rolls into a tight ball of overlapping scales that even a lion cannot bite through.
Groundhog
During hibernation, a groundhog’s heart rate falls from about 80 beats a minute to as few as 5, and its body temperature drops to just a few degrees above freezing.
Harbor Seal
Harbor seals can follow the invisible water trail left by a fish using only their whiskers, even when the trail is over half a minute old.
Hippopotamus
Hippos secrete a reddish fluid that works as a natural sunscreen and may help protect against bacteria.
Honey Badger
The honey badger’s skin is so thick and loose that it can twist around inside it to bite an attacker that has grabbed it.
Howler Monkey
Howler monkeys are among the loudest land animals: their roars can carry about 5 km through the forest.
Humpback Whale
Male humpbacks sing complex songs that can last up to 20 minutes, and whole populations change their song over time as new versions spread.
Iberian Lynx
In 2002 fewer than 100 Iberian lynx survived; by 2023 there were more than 2,000, and the species was downlisted from Endangered to Vulnerable in 2024.
Impala
Impala can leap about 3 metres high and 10 metres long, often bounding over bushes or even other impala when fleeing predators.
Indian Grey Mongoose
The Indian grey mongoose is famous for fighting cobras, relying on speed, thick fur and partial resistance to snake venom.
Indri
Indri families sing haunting songs that carry over 2 km, and scientists found their songs share rhythms with human music.
Jaguar
Jaguars have the strongest bite relative to body size of any big cat, strong enough to pierce a turtle’s shell or a caiman’s skull.
Japanese Macaque
The famous ‘snow monkeys’ of Jigokudani bathe in hot springs in winter, and studies show bathing lowers their stress hormones.
Javan Rhinoceros
All the world’s Javan rhinos live in a single national park; the last one in Vietnam was killed by poachers in 2010.
Koala
Koalas have fingerprints so similar to human fingerprints that they can be hard to tell apart even under a microscope.