The Biggest Animals Kingdom and in The World | Crotalus Adamanteus | The heaviest known specimen of 7.8 meters (2.4 ft) long, was shot in 1946 and weighed 15.4 kg (34 lb). Said maximum length 8 feet (2.4 m) and 8.25 ft (2.5 m). Specimens more than 7 feet (2.1 m) are rare but well documented. The reward was never claimed. 7.3 feet (2.2 m) specimen was captured and slain outside a neighborhood in St. Augustine, Florida, in September 2009. One study showed an average length of 5.6 feet (1.7 m) on the basis of 31 men and 43 women. The average body weight of 2.3 kg (5.1 lb). Some specimens may exceed 5.12 kg (11.3 lb), although exceptional specimens can weigh 6.7 kg (15 lb) or more. The host station includes 25-31 (usually 29) rows of dorsal scales in the mid-body, 165-176/170-187 ventral scales in men / women and 27-33/20-26 scales coverts in men / women. On the head, the rostral scale is higher than it is wide, and two scales internasal contacts. There are 10 to 21 scales in the region internasal-prefrontal and 5-11 (usually 7-8) intersupraocular scales. Usually there are two scales between loreal preoculars and post-nasal drip.
The color pattern consists of a brown, yellowish brown, brownish gray or olive green, covered with a series of 24-35 dark brown to black with diamond centers a bit clearer. Back, diamonds and more transverse bands and are followed by 5-10 bands around the tail. The belly is yellowish or cream, with diffuse dark spots along the sides. Forward and backward, the band is limited by various postocular white or yellow bands. C. adamanteus is located in the southeast United States southeastern North Carolina, south along the coastal plain of the Florida peninsula to the Florida Keys, and west along the Gulf coast through southern Alabama and Mississippi to southeastern Louisiana.
The original description of the species has no type place, although Schmidt (1953) suggested that it is restricted to "Charleston, SC" (USA) This rattle snakeinhabits dry pine drawer pine and palmetto Flatwoods, dunes and coastal maritime hammocks, Longleaf pine / turkey oak habitats, grass-sedge marshes and swamp forests of cypress swamps, Mesic hammocks, sandy mixed woodlands of xeric hammocks, and salt marshes, and wet prairies during dry periods. Adult wild caught specimens are often difficult to maintain in captivity, but captive bred specimens are doing very well and feed easily slain laboratory rodents.