Meet over 10,000 amazing animals, from tiny marching leafcutter ants to our giant 193kg silverback gorilla.
Discover key facts about your favourite animals - from the foods they eat to the threats they face in the wild. And find out how we’re tackling threats and protecting endangered species with our global wildlife conservation work. You can also download our full species register document.
There are only several hundred Asiatic lions in the wild, and they only live in the Gir Forest, India, in an area that is smaller than Greater London.
Sumatran tigers are smallest and rarest tiger, and they have the deepest orange colour of all the tiger subspecies.
Gorillas are the world's largest primate, weighing up to 200kg. They share 98.4% of their DNA with humans, and all four subspecies are critically endangered.
Giraffes have the same number of neck bones as humans – although theirs are linked by ball and socket joints enabling them far greater flexibility.
There are less than 2500 pygmy hippos left in the wild, and they are the only surviving member of their genus.
A sloths’ internal organs, such as the heart, spleen, and liver are all arranged to accommodate living upside-down.
The okapi was first discovered by the western world by ZSL fellow, Sir Harry Johnston, in 1901 but what else do we know about this extraordinary and shy creature?
Humbolt penguins are from the beaches of Peru and Chile, and can swim speeds of up to 30mph!
Abdim’s stork are thought to bring rain and good luck, and form huge flocks of up to 10,000 birds.
African bullfrogs have a monstrous appetite, and will eat anything that moves, from large birds, to snakes and even other bullfrogs!
These lemurs can actually swim, with mothers even carrying their young on her back whilst paddling along.
Alpacas are a domestic animal bread from the vicuña, which are native to the Andes.