Epicrates maurus is a species of non-venomous constrictor, in the family of Boinae, found in Amazon region of South America. Common name is Colombian rainbow boa. While a terrestrial species, with its moderate size and weight it has a semi-arboreal life. Rainbow boas are known for their attractive iridescent sheen on their scales in the sunlight.
== Description ==
Size and weight- The Colombian rainbow boa is the smallest of the rainbow boas, reaching lengths of, 3 to 5 feet on average.〔Mattison, C. 2007. "The New Encyclopedia of Snakes". Princeton University Press. ISBN 0-691-13295-X.〕 There is clear sexual dimorphism between male and female, with females being significantly larger, in both length and girth.
Coloring- Generally uniform brown in color with large dark edged vertebral rings, with light centers forming saddles, this may also appear as a slightly off-center 'S' pattern.〔O'Shea, M. 2007. Boas and Pythons of the World. Princeton, New Jersey: Princeton University Press. ISBN 0-691-13100-7.〕 Through a process of metachrosis, they have a day-to-night color change. Primarily noticed in that their pattern will become a lighter almost silver and have a molted silver sides and bottom.〔R.D. Bartlett, C.2004. "Rainbow Boas and Neotropical Tree Boas". Barron's Educational Series, Inc. ISBN 0-7641-2686-5.〕 Although individuals of abnormal colors and patterns exist, for example those that exhibit pigmentation disorders such as albinism,〔Ilo Hiler, Albinos. Young Naturalist. The Louise Lindsey Merrick Texas Environment Series, No. 6, pp. 28–31. Texas A&M University Press, College Station (1983).〕 they are very rare in the wild, but are often found in captivity where these mutations are often prized.
Image:Rainbow_Boa_jlbd2.JPG|Colombian rainbow boa daytime
Image:Rainbow_boa_jlbn1.JPG|Colombian rainbow boa nighttime
These pictures provide a good example of the day-to-night color change;
both pictures are of the same snake. Pictures were taken 3.2 hours apart.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』