For the orthographic projection as a map projection, see Orthographic projection in cartography. For mathematical discussion in terms of linear algebra, see Projection (linear algebra).
Bullfrogs are the largest real frog found in North America, weighing up to 0.5 kg and measuring 460 mm in length. Their average length is 100-175 mm. Their color varies from brownish to shades of green, often with spots or blotches of a darker color around their backs. Their back feet are fully webbed.
Family. The American bullfrog belongs to taxonomic family Ranidae, which includes the true frogs, ranid frogs and riparian frogs. The classification of Ranidae has undergone major changes in the past, with some subfamilies being removed and placed in other families or as their own families.