The average garden-variety caterpillar has 248 muscles in its head. A goldfish has a memory span of 3 seconds. A mule won't sink in quicksand but a donkey will. More people are killed annually by donkeys than in airplane crashes. Animal breeders in Russia once claimed to have bred sheep with blue wool.
Penguins are the only bird that can leap into the air like porpoises.
India has 50 million monkeys. By some unknown means, an iguana can end its own life. Pigs can cover a mile in 7.5 minutes when running at top speed. The shell constitutes 12 percent of an egg's weight. A squid has 10 tentacles.