The male seahorse, not the female, carries the embryo of the species. The female fills the male's brooch pouch with eggs, which remain in the swollen sac for a gestation period of eight to ten days.
The conception and birth of the armadillo are odd events. Although mating usually occurs in July, the embryos of the armadillo remain in a dormant state until November. Later in March, four young are born. Armadillos are the only mammals in which multiple young form from a single egg with any regularity. All four of the young, always of the same sex, are identical quadruplets and developed from the same egg. They even shared a single placenta while in the womb.
Rats can swim for a 1/2 mile without resting, and they can tread water for 3 days straight.
It seems to biologists that, unlike their humpback whale relatives whose underwater song evolves from year to year, killer whales retain individual dialects unchanged over long periods, possibly even for life.
There are 690 known species of bats.
The massive skeleton of the African elephant accounts for about 15 percent of the body weight, just as in a man of slender build; however, the elephant's skeleton supports as much as four tons per leg, and is thus stressed close to the physical limit for bone. To keep from damaging its skeleton, an African elephant has to move sedately, never jumping or running. The "charge" of these animals is a fast walk on long legs, at about 15 miles per hour.
Rattlesnakes gather in groups to sleep through the winter. Sometimes up to 1,000 of them will coil up together to keep warm.
It takes 11 dump-truck loads of wood to make a proper funeral pyre for a full-size elephant.
There are about 130 species of owl.
The maximum life span of koi has been documented to be over 200 years in exceptional cases. The average life span of the large colorful fish, however, is 25 to 35 years.
The crocodile continually grows new sets of teeth to replace old teeth. It also cannot move its tongue. The tongue is rooted to the base of its mouth.
Reindeer have scent glands between their hind toes. The glands help them leave scent trails for the herd. Researchers say the odor smells cheesy.
It takes a lobster approximately seven years to grow to be one pound
There are about 40 different muscles in a birds wing.
The Mojave ground squirrel, found mainly in the American West, hibernates for two-thirds of every year.
The crocodile does not chew its food, but swallows it whole. It carries several pounds of small stones in its stomach to aid in grinding up and digesting its nourishment.
It takes about 50 hours for a snake to digest one frog.
There are about 5,000 species of coral known. Only about half of them build reefs.
The Mola Mola, or Ocean Sunfish, lays up to 5,000,000 eggs at one time.
The crocodile is a cannibal; it will occasionally eat other crocodiles.
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