31. With these beaks males are able to feed differently on their favourite cactus, the prickly pear " Opuntia ". 32. Yet again others & ndash; namely the " Mexican and the southern United States "'Opuntia " farms. 33. Another successful program was the virtual eradication of " Opuntia vulgaris " by the use of cochineal insects in 1913. 34. With these beaks, males are able to feed differently on their favourite cactus, the prickly pear " Opuntia ". 35. The two largest genera within the subfamily, " Opuntia " and " Cylindropuntia " are also not monophyletic. 36. Endemic species include the prickly pear cactus, Opuntia , more familiar to Mexicans and residents of the U . S . Southwest. 37. Other animals that eat " Opuntia " include the prickly pear island snail and " Cyclura " rock iguanas. 38. From Native Americans, Westerners learned the practice of eating cactus fruit from the myriad species of opuntia that occupy the Mojave desert lands. 39. In 1926 Alwin Berger completed the separation from " Opuntia " by raising " Brasiliopuntia " to a full genus. 40. Opuntia Lake is strategically situated in the major goose fall staging area of Western Canada, is a very important staging area for waterfowl.
