Chickens can't swallow while they are upside down.

Japan's Tokyo Zoo closes for two months each year to give the animals a break from visitors.

The world's termites outweigh the world's humans 10 to 1.

Elephants are the only mammals that can't jump.

Giraffes rarely sleep more than 20 minutes a day.

It is possible to lead a cow up stairs, but not down.

Lions sleep almost 20 hours a day .

For several centuries, women used to rub crushed strawberries on their breasts in the belief that it would enlarge them.

A giraffe has a 20-inch tongue.

Giraffes were at one time referred to by Europeans as "cameleopards," believing giraffes were the offspring of camels and leopards.

Human birth control pills work on gorillas.

A cockroach breaks wind every 15 minutes.

Pandas in China have been given Viagra to help them mate.

Crab was the only named dog in any Shakespearian play. The play was Two Gentlemen of Verona.

A woodpecker can peck 20 times a second.

A flamingo can only eat when its head is upside down.

A female African elephant can be pregnant for nearly two years.

Despite its hump, a camel has a straight spine.

Amphibians see no colour; they perceive only black and white.

Dogs are mentioned fourteen times in the Bible.

A newly hatched crocodile is three times as large as the egg from which it has emerged.

A baby blue whale is 25 feet long at birth.

A baby giraffe is about six feet tall at birth.

It takes an average of 345 squirts to yield a gallon of milk from a cow's udder.

It would require an average of 18 hummingbirds to weigh in at 1 ounce.

The temperature of the sand, during egg incubation, determines the gender of sea turtles. Warm temperatures produce more females; cooler temperatures produce more males.

Dolphins swim in circles while they sleep with the eye on the outside of the circle open to keep watch for predators. After a certain amount of time, they reverse and swim in the opposite direction with the opposite eye open.

Ducks will lay eggs only in the early morning.

Rats can swim for a 1/2 mile without resting, and they can tread water for 3 days straight.

Eagles mate while airborne.

Rome has more homeless cats per square mile than any other city in the world.

Male monkeys lose the hair on their heads in the same manner men do.

Sheep will not drink from running water.

Prawns swim backwards.

Snails have teeth.

he embryos of tiger sharks fight each other while in their mother's womb, the survivor being the baby shark that is born.

A crocodile can't stick it's tongue out.

It is physically impossible for pigs to look up into the sky.

A pregnant goldfish is called a twit.

In a study of 200,000 ostriches over a period of 80 years, no one reported a single case where an ostrich buried its head in the sand.

Rats multiply so quickly that in 18 months, two rats could have over million descendants.

A duck's quack doesn't echo, and no one knows why.