The hippopotamus has the world's shortest sperm.
The average life expectancy of a rhinoceros in captivity is 15 years.
Mountain goats grow luxurious winter coats — more than three inches of cashmere-quality wool, overlaid with long hollow hairs. The hardy animals can endure winter temperatures as low as minus 50 degrees F, and powerful winds up to 100 miles per hour.
The hippopotamus is, next to the elephants, the heaviest of all land mammals. It may weigh as much as 8,000 pounds. It is also a close relative of the pig.
The average minimal speed of birds in order to remain aloft in flight is reported to be about 16½ feet per second, or about 11 miles per hour.
Mussels can thrive in polluted water because of an inborn ability to purify bacteria, fungi, and viruses.
Guinea pigs were first domesticated by the Incas, who used them for food, in sacrifices, and as household pets.
The Hirudo leech has three jaws with 100 teeth on each jaw — making 300 teeth in all. The Amazon leech uses a different method of sucking blood. They insert a long proboscis into the victim as opposed to biting.
The average porcupine has more than 30,000 quills. Porcupines are excellent swimmers because their quills are hollow and serve as pontoons to keep them afloat.
Native peoples of South America catch piranha and use their razor-sharp teeth to make tools and weapons.
Hamadryas baboons, in ancient Egypt, were believed to be companions and oracles of the god Thoth. They were given the honor of being mummified when they died.
Canned herring were dubbed "sardines" because the canning process was first developed in Sardinia, Italy.
The Hirudo leech lays its babies within a cocoon; the Amazon leech carries its babies on its stomach — sometimes as many as 300.
The average snail moves at a rate of approximately 0.000362005 miles per hour
Ninety percent of all species that have become extinct have been birds.
Heavily cultivated, though it may have been in England, the leek is the national emblem of Wales.
Carp are the largest of the minnows — it's a big family, including over 300 American species, mainly small freshwater fishes. True minnows (family Cyprinidae) are soft-rayed fishes with teeth in their throats only.
The horned lizard of the American southwest may squirt a thin stream of blood from the corners of its eyes when frightened.
The Bactrian camel is the only land mammal on Earth that can survive on salt water
Not all leeches are bloodsuckers. Many are predators which eat earthworms, etc. The nearest relatives of leeches are earthworms.
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