Macaws are the world’s largest parrots. There are 17 different kinds, ranging in size from the magnificent cobalt-blue hyacinth, which can weigh in at 3 pounds, to the petite Hahns, which might weigh just a tenth as much.
Article Source : http://www.pbs.org/wnet/nature/the-real-macaw-endangered-tropical-jewels/2734/
Image Credit : http://www.worldsultimate.net/magical-blue-macaw-those-incredible-bright-blue-feathers.htm