Mammals are the only animals with flaps around the ears.
There are about one billion cattle in the world of which 200 million are in India.
A dog was the first in space and a sheep, a duck and a rooster the first to fly in a hot air balloon.
The Big Five is a group of animals of Africa: cape buffalo, elephant, leopard, lion and rhino.
The pig is rated the fourth most intelligent animal but are mentioned only twice in the Bible
The coyote is a member of the dog family and its scientific name, "canis latrans" means barking dog.
A group of geese on the ground is a gaggle - a group of geese in the air is a skein. More animal collective nouns
It is impossible to out-swim a shark - sharks reach speeds of 44 mph (70 km/h). Humans can run about 21 mph (35 km/h).
Of the 650 types of leeches, only the Hirudo medicinalis is used for medical treatments.
The eel is the only fish in the world that spawns in the middle of an ocean but spends its adult lives in rivers.
The scales of a crocodile are made of ceratin, the same substance that hooves and fingernails are made of.
A crocodile's tongue is attached to the roof of its mouth and cannot move it.
The heaviest crustacean ever found was a lobster weighing 42 lb (19 kg), caught in 1934.
The giant squid has the biggest eyes of any animal: its eyes measure 16 inches (40 cm) in diameter.
Domestic cats purr at about 26 cycles per second, the same frequency as an idling diesel engine.
Animals also are either right-handed or left-handed. Polar bears are left-handed – and so is Kermit the Frog.
There are 701 types of pure breed dogs. There are about 54 million dogs in the US, and Paris is said to have more dogs than people.
Some bird species, usually flightless birds, have only a lower eyelid, whereas pigeons use upper and lower lids to blink.
Millions of trees are accidentally planted by squirrels who bury nuts and then forget where they hid them.
There are more than 150 million sheep in Australia, a nation of 21 million people.