Reproductive cycle
According to figure 5, the females with follicles were found throughout the year, of
which the peak were occurred in October (90% of collected snakes). Oviducal eggs and early
period of embryos were recorded in 2 periods, from February to May and from July to
September. The peak were occurred in April (80% of collected female snakes) and followed
by August (38% of collected female snakes). Gravid female snakes containing the full-term
stage of an embryo, stage 37, were found from May (5% of collected snakes) to June (16% of
collected snakes) and September (11% of collected snakes). Each reproductive condition of
female snakes was shown in figure 6.