The boomslang (Dispholidus typus) is oviparous, and an adult female can produce up to 30 eggs, which are deposited in a hollow tree trunk or rotting log. The eggs have a relatively long (three months on average) incubation period. Male hatchlings are grey with blue speckles, and female hatchlings are a pale brown. They attain their adult coloration after several years. Hatchlings are approximately 20 cm (7.9 in) in length and pose no threat to humans, but are dangerously venomous by the time they reach a length of about 45 cm (18 in) and a girth as thick as an adult's smallest finger.