According to Orlov and Ryabov (2002), the Green Cat-eyed Snake (Boiga cyanea) is known from Vietnam, Cambodia, Laos, Thailand, peninsular Malaysia, Myanmar, eastern India [West Bengal, Sikkim, Assam, Arunachal Pradesh, Meghalaya], Bhutan, Bangladesh, China [Yunnan])
Lincoln and Schranz (1975) reported on the hatching of a clutch of Boiga cyanea eggs in captivity. Of five eggs, two were infertile. The remaining three eggs hatched successfully after a total incubation period of 108-111 days. Although adults of this species are nearly all green, with a white throat and some light blue on the upper labials, the hatchlings were mostly reddish brown with a green head, white throat, and bright yellow upper labials. The hatchlings were 15 1/2 to 15 3/4 inches long. The red color of young was also noted and discussed by Golder (1987).
de Lisle (1984) reported on an incident in which one captive B. cyanea individual (120 cm long) accidentally struck and bit a second individual (155 cm) ~2cm behind its head while pursuing a mouse. The attacker held on for several minutes before the two snakes were separated. The larger snake became lethargic ~2 hours after being bitten. Its muscular weakness increased over the next two days, No other symptoms were noted, but the snake died 30 hours after being bitten.
Shea (2003) reported on rivalry between two male B. cyanea in captivity. The two males were observed locked in combat on the floor of the cage while a female was coiled on a branch above. The males entwined their elongate tails together in a tight and complex knot while their heads and mid and anterior portions of their bodies were used to compress the other to the floor in a slow twisting motion. The behavior was observed for ~ 10 minutes before the males separated.
