The American Society for Prevention of Cruelty to Animals (ASPCA) was formed in 1866.
The anaconda, one of the world's largest snakes, gives birth to its young instead of laying eggs.
The average adult male ostrich, the world's largest living bird, weighs up to 345 pounds.
The biggest members of the cat family are Siberian and Bengal tigers, which can reach over 600 pounds.
The blood of mammals is red, the blood of insects is yellow, and the blood of lobsters is blue.
The bloodhound is the only animal whose evidence is admissible in an American court.
The blue whale is the loudest animal on Earth. The call of the blue whale reaches levels up to 188 decibels. This extraordinarily loud whistle can be heard for hundreds of miles underwater. The second-loudest animal on Earth is the Howler Monkey.
The bones of a pigeon weigh less than its feathers.
The calories burned daily by the sled dogs running in Alaska's annual Iditarod race average 10,000. The 1,149-mile race commemorates the 1925 "Race for Life" when 20 volunteer mushers relayed medicine from Anchorage to Nome to battle a children's diphtheria epidemic.
The Canary Islands were not named for a bird called a canary. They were named after a breed of large dogs. The Latin name was Canariae insulae - "Island of Dogs."
The cat lover is an ailurophile, while a cat hater is an ailurophobe.
The catgut formerly used as strings in tennis rackets and musical instruments does not come from cats. Catgut actually comes from sheep, hogs, and horses.
The chameleon has several cell layers beneath its transparent skin. These layers are the source of the chameleon's color change. Some of the layers contain pigments, while others just reflect light to create new colors. Several factors contribute to the color change. A popular misconception is that chameleons change color to match their environment. This isn't true. Light, temperature, and emotional state commonly bring about a chameleon's change in color. The chameleon will most often change between green, brown and gray, which coincidently, often matches the background colors of their habitat.
The cheetah is the only cat in the world that can't retract its claws.
The Chinese, during the reign of Kublai Khan, used lions on hunting expeditions. They trained the big cats to pursue and drag down massive animals - from wild bulls to bears - and to stay with the kill until the hunter arrived.
The elephant, as a symbol of the US Republican Party, was originated by cartoonist Thomas Nast and first presented in 1874.
The English Romantic poet Lord Byron was so devastated upon the death of his beloved Newfoundland, whose name was Boatswain, that he had inscribed upon the dog's gravestone the following: "Beauty without vanity, strength without insolence, courage without ferocity, and all the virtues of man without his vices."
The expression "three dog night" originated with the Eskimos and means a very cold night - so cold that you have to bed down with three dogs to keep warm.
The fastest bird is the Spine-tailed swift, clocked at speeds of up to 220 miles per hour.
The fastest -moving land snail, the common garden snail, has a speed of 0.0313 mph.
The first house rats recorded in America appeared in Boston in 1775.
The giant squid is the largest creature without a backbone. It weighs up to 2.5 tons and grows up to 55 feet long. Each eye is a foot or more in diameter.
The harmless Whale Shark, holds the title of largest fish, with the record being a 59 footer captured in Thailand in 1919.
The hummingbird is the only bird that can hover and fly straight up, down, or backward!
The hummingbird, the loon, the swift, the kingfisher, and the grebe are all birds that cannot walk.
The Kiwi, national bird of New Zealand, can't fly. It lives in a hole in the ground, is almost blind, and lays only one egg each year. Despite this, it has survived for more than 70 million years.
The largest animal ever seen alive was a 113.5 foot, 170-ton female blue whale.
The largest bird egg in the world today is that of the ostrich. Ostrich eggs are from 6 to 8 inches long. Because of their size and the thickness of their shells, they take 40 minutes to hard-boil.
The largest Great White Shark ever caught measured 37 feet and weighed 24,000 pounds. It was found in a herring weir in New Brunswick in 1930.
The largest pig on record was a Poland-China hog named Big Bill, who weighed 2,552 lbs.
The last member of the famous Bonaparte family, Jerome Napoleon Bonaparte, died in 1945, of injuries sustained from tripping over his dog's leash.
The male penguin incubates the single egg laid by his mate. During the two month period he does not eat, and will lose up to 40% of his body weight.
The most frequently seen birds at feeders across North America last winter were the Dark-eyed Junco, House Finch and American goldfinch, along with downy woodpeckers, blue jays, mourning doves, black-capped chickadees, house sparrows, northern cardinals and european starlings.
The mouse is the most common mammal in the US.
The name of the dog from "The Grinch Who Stole Christmas" is Max.
The name of the dog on the Cracker Jack box is Bingo.
The only dog to ever appear in a Shakespearean play was Crab in The Two Gentlemen of Verona
The only domestic animal not mentioned in the Bible is the cat.
The Pacific Giant Octopus, the largest octopus in the world, grows from the size of pea to a 150 pound behemoth potentially 30 feet across in only two years, its entire life-span.
The penalty for killing a cat, 4,000 years ago in Egypt, was death.
The phrase "raining cats and dogs" originated in 17th Century England. During heavy downpours of rain, many of these poor animals unfortunately drowned and their bodies would be seen floating in the rain torrents that raced through the streets. The situation gave the appearance that it had literally rained "cats and dogs" and led to the current expression.
The pigmy shrew - a relative of the mole - is the smallest mammal in North America. It weighs 1/14 ounce - less than a dime.
The poison-arrow frog has enough poison to kill about 2,200 people.
The poisonous copperhead snake smells like fresh cut cucumbers.
The Smithsonian National Museum of Natural History houses the world's largest shell collection, some 15 million specimens. A smaller museum in Sanibel, Florida owns a mere 2 million shells and claims to be the worlds only museum devoted solely to mollusks.
The term "dog days" has nothing to do with dogs. It dates back to Roman times, when it was believed that Sirius, the Dog Star, added its heat to that of the sun from July3 to August 11, creating exceptionally high temperatures. The Romans called the period dies caniculares, or "days of the dog."
The turbot fish lays approximately 14 million eggs during its lifetime.
The turkey was named for what was wrongly thought to be its country of origin.
The underside of a horse's hoof is called a frog. The frog peels off several times a year with new growth.
The viscera of Japanese abalone can harbor a poisonous substance which causes a burning, stinging, prickling and itching over the entire body. It does not manifest itself until exposure to sunlight - if eaten outdoors in sunlight, symptoms occur quickly and suddenly.
The world record frog jump is 33 feet 5.5 inches over the course of 3 consecutive leaps, achieved in May 1977 by a South African sharp-nosed frog called Santjie.
The world's largest mammal, the blue whale, weighs 50 tons at birth. Fully grown, it weighs as much as 150 tons.
The world's largest rodent is the Capybara. An Amazon water hog that looks like a guinea pig, it can weigh more than 100 pounds.
The world's smallest mammal is the bumblebee bat of Thailand, weighing less than a penny.
There are around 2,600 different species of frogs. They live on every continent except Antarctica.
There are more than 100 million dogs and cats in the United States. Americans spend more than 5.4 billion dollars on their pets each year.
There is no single cat called the panther. The name is commonly applied to the leopard, but it is also used to refer to the puma and the jaguar. A black panther is really a black leopard.
Tigers have striped skin, not just striped fur.
Turkeys originated in North and Central America, and evidence indicates that they have been around for over 10 million years.
Unlike most fish, electric eels cannot get enough oxygen from water. Approximately every five minutes, they must surface to breathe, or they will drown. Unlike most fish, they can swim both backwards and forwards.
Whales and dolphins can literally fall half asleep. Their brain hemispheres alternate sleeping, so the animals can continue to surface and breathe.
When a female horse and male donkey mate, the offspring is called a mule, but when a male horse and female donkey mate, the offspring is called a hinny.
When the Black Death swept across England one theory was that cats caused the plague. Thousands were slaughtered. Ironically, those that kept their cats were less affected, because they kept their houses clear of the real culprits, rats.
Worldwide, goats provide people with more meat and milk than any other domestic animal.