In Denmark there are twice as many pigs as people.
Measured in straight flight, the spine-tailed swift is the fastest bird. It flies 170 km/h (106 mph). Second fastest is the Frigate, which reaches 150 km/h (94 mph).
Of the 650 types of leeches, only the Hirudo medicinalis is used for medical treatments.
The coyote is a member of the dog family and its scientific name, “canis latrans” means barking dog.
The tongue of a blue whale is as long as an elephant.