Corallus caninus Nederland - website dedicated to the Emerald Tree Boa of South America

7. Remove the first male after 5 days and house separately. Then introduce the second male early next morning. Repeat the procedure as described in points 4-6.
8. Cycle the males every 3-5 days until copulations are observed. These may take approximately 1-2 hours each time. The first signs of mating behaviour are when the male and female begin 'cuddling' or sharing the same spot on a perch (since this species is generally a solitary animal, these are surely the initial signs of pairing behaviour). When no further interest is shown either by the female or the male (after February/March), they should be separated again and housed in their own confinement(s).
9. Male feedings should be resumed after this period and attempts to feed the female may also be made.
10. Steadily increase temperatures to normal again and decrease humidity slightly. Provide a comfortable basking spot for the female in this period.
11. If matings are successful, this will be followed by ovulation in the female. This is the pronounced swelling of the mid-body region and should last 12-48 hours. This is a sign that the female was indeed receptive to matings and that she is most probably gravid. The first signs of gravidity in the female are her refusal to feed and marked restlessness about 30 days after copulations.
12. The POS (post-ovulation shed) generally takes place 3 weeks (20-25 days) after completion of the ovulation.
13. If the female is gravid and matings are successful, the birth of the young will generally follow125-150 days, soemtimes even as long as 225 days after the POS (this may vary, depending on environmental conditions and on the condition of the female).
14. The female must be well cared for during this period and must be provided with an easily accessible basking spot.

15. A few days before the birth of the young, the female will become very restless and drink excessively. She will continue to move her sides beneath the basking spot and allow her body to loosen and the tail to drop. This may be to facilitate bowel-movement as she announces the birth of the young a few days later. Births generally take place in the early morning when temperatures are at their lowest but begin to rise. 24-48 hours before birth the female will release a 'fecal plug' to faciltate the free passage of the young.