The giant African snail grows to a foot long and reaches weights greater than a pound.
Unrelated to the chicken, the male cock-of-the-rock bird earned the name "cock" because of its rooster-like appearance and combative behavior. The female of the species influenced the word "rock" being added to the name because of her habit of nesting and rearing the young in sheltered rock niches.
The ruby-throated hummingbird beats its wings at the incredibly rapid speed of 50 to 70 times a second. If a 170-pound man expended energy at the rate of the hummingbird, he would have to eat 285 pounds of hamburger or twice his weight in potatoes each day in order to maintain his weight. He would have to evaporate 100 pounds of perspiration per hour to keep his skin temperature below the boiling point of water.
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.
Vampire bats do not suck blood. They bite, then lick up the flow.
The Rufous is the only species of hummingbird to nest in Alaska. They migrate 2,000 miles to Mexico each winter, and then back to Alaska in the spring.
The giraffe's heart is huge; it weighs 25 pounds, is 2 feet long, and has walls up to 3 inches thick.
Vampire bats need about 2 tablespoonfuls of blood each day. The creature is able to extract its dinner in approximately 20 minutes.
The sea cucumber, a purplish-brown creature covered with warts, has a unique defense strategy. When attacked, it throws out sticky threads from its mouth, which entangles its enemy. The sea cucumber can then quickly escape.
The gopher snake found in the state of Arizona is not poisonous, but when frightened, it may hiss loudly and vibrate its tail like a rattlesnake.
Very unusual for carnivores, hyena clans are dominated by females.
The sea lion can swim 6,000 miles, stopping only to sleep.
The great horned owl can turn its head 270 degrees.
Wandering albatrosses spread their wings, clack bills, and shake heads in a ritual dance. Bonds between courting birds may last the whole of a 50-year lifetime.
The sea lion is susceptible to sunburn, and if put on board a ship, will get as seasick as a man.
The grebe, an aquatic bird, has an effective means of escaping danger while protecting its young. At the first sign of danger, it will sink into the water until its back is level with the surface. This allows its offspring to swim over and quickly climb onto its back. The parent grebe then rises up to its swimming position and ferries the chicks across the water to safety.
We are sure that whales and dolphins had land-living ancestors, but we don't know what they were like and we don't know how they evolved
The sea otter's dark fur is the finest and densest of any animal fur. On an adult animal, there are approximately 650,000 hairs per square inch. A sea otter relies on its fur to keep it warm — it doesn't have blubber as other marine mammals do. Natural oils in a sea otter's fur repel water.
The grizzly bear is capable of running as fast as the average horse.
Weighing approximately 13 pounds at birth, a baby caribou will double its weight in just 10 days.
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