Most tropical marine fish could survive in a tank filled with human blood.
Gray whales migrate 12,000 miles each year, farther than any other mammal.
California sea otters spend almost all of their time in the water. Alaska sea otters often sleep, groom, and nurse on land.
The average fox weighs 14 pounds.
Most varieties of snake can go an entire year without eating a single morsel of food.
Green turtles may breed for the first time when they are between 25 to 50 years old. This figure varies, depending upon the creature's range and the diet of the maturing turtle.
Camel milk is the only milk that doesn't curdle when boiled.
The average giraffe's blood pressure is two or three times that of a healthy man.
Mother prairie dogs will nurse their young only while underground in the safety of the burrow. If an infant tries to suckle above ground, the mother will slap it.
Greyhounds have the best eyesight of any breed of dog.
Camels have three eyelids to protect themselves from blowing sand.
Mother-of-pearl is not always white. It can be pink, blue, purple, gray, or even green. Nor is it produced only by the pearl oyster. The abalone and the pearl mussel both have shells that are lined with fine-quality mother-of-pearl.
Groundhogs are “fossorial” — they live most of their lives underground. They dig burrows or “dens” that have several entrances. Each is connected with the main tunnel and the nesting chamber where the animal hibernates for the winter. A groundhog's whiskers help it navigate underground.
Camels instinctively know their own endurance and will refuse to move beyond it. If their masters try to drive them farther, they will lie down and refuse to budge.
Groups: A group of unicorns is called a blessing. A group of kangaroos is called a mob. A group of whales is called a pod. A group of geese is called a gaggle. A group of owls is called a parliament. A group of ravens is an unkindness. A group of crows is a murder. A group of bears is called a sleuth. Twelve or more cows is called a flink.
Camels were domesticated around 4,000 years ago.
Camels were used as pack animals in Nevada and Arizona as late as 1870.
The hippopotamus gives birth underwater and nurses its young in the river as well, although the young hippos must come up periodically for air.
The hippopotamus has skin an inch-and-a-half thick, so solid that most bullets cannot penetrate it.
The average life expectancy of a leopard in captivity is 12 years.
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