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.

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