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.
Their bait was a bullfrog, or several small frogs in a bunch, for want of squid. Silence had fallen upon the little group, and a bullfrog down in the fishpond was croaking dismally. The bullfrog and leopard frog probably take heavy toll of both the adults and the newly metamorphosed young at the breeding ponds. The bullfrog lover (p. 310): The first amusing little tale was heard from several story-tellers. Here I heard in the evening, for the first time the croaking of the large frog, known under the name of bullfrog.