Until 2009, it was considered a subspecies of Python molurus, but now is recognized as belonging to a distinct species. They are often found near water and are sometimes semi-aquatic, but can also be found in trees. Wild individuals average 3.7 m (12.1 ft) long, but have been known to reach 5.74 m (18.8 ft).he African rock python can generally be distinguished by its tighter pattern of markings, compared to the Burmese python, which has bolder patterns, similar to those seen on a giraffe. In the wild, Burmese pythons grow to 3.7 m (12 ft 2 in) on average, while specimens of more than 4 m (13 ft 1 in) are uncommon.
The brown tree snake (Boiga irregularis) was accidentally introduced to Guam in the late 1940s or early 1950s, probably from the Solomon Islands. Native to northeastern Australia, eastern Indonesia, and Melanesia, the brown tree snake has signiï¬ cantly damaged the economy and ecology of Guam.
The maximum recorded size for the species is 2.4 m (7.9 ft), although any specimen of greater than 2 m (6.6 ft) in total length would be considered exceptionally large. Large eastern brown snakes are often confused with  king brown  snakes (Pseudechis australis), whose habitat they share in many areas.orrell (1963) reported a milking of 41.4 mg from a relatively large 2.1 metres (6.9 ft) specimen. This record is atypical, as the eastern brown snake yields a low volume of venom which is reported as not more than 10 mg, averaging only 2 mg (dry weight).