Animals feed
The Americas
Living hummingbirds are naturally found only in the Americas and nearby islands. Their present distribution includes habitats from northern breeding grounds to tropical forests and the high Andes.
3
Octopuses have three hearts: two supply the gills and one supplies the rest of the body. Their oxygen-carrying protein contains copper and turns blue when oxygenated.
Cubes
Wombats produce distinctly cube-like droppings, shaped inside the intestine rather than by a square opening. Research links the shape to differences in the mechanical properties of the intestinal wall.