21 October 2012

These butterflies migrate between UK and Africa, they reach an altitude of 1000 meters, and one direction takes six generations of butterflies. Now where do them butterflies ask for directions ?
http://www.bbc.co.uk/nature/19991550

Also amazing: the metabolism of the hummingbird
https://en.wikipedia.org/wiki/Hummingbird#Metabolism
the tiny heart of a hummingbird can beat up to 1,260 beats per minute; and the bird flies distances of 800km, to conserve energy, it enters hibernation at night.