Hummingbirds WWF Wall Calendar: Many of them named for the jewels they resemble, hummingbirds are truly among nature's most exquisite creatures. They are unique in the bird kingdom, as they alone can fly backwards. They flit and hover throughout the Americas, as they are able to adapt to a variety of habitats. These tiny, high-energy gems grace every garden they visit with their breathtaking beauty. In the U.S. and Canada, World Wildlife Fund (WWF) receives 50 cents for each 2014 WWF calendar purchased, with a guaranteed contribution of $50,000. EAN: 9781620211045