Hummingbird metabolism is a marvel of evolutionary engineering. These tiny birds can power all of their energetic hovering flight by burning the sugar contained in the floral nectar of their diet.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/f...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/f...