The Basics:

With bright green skin, a double crest on its head and a fin-like crest on its back and tail, the Green Basilisk is one of the most attractive lizards. Its appearance and behavior make it a fascinating lizard to watch, but it is not meant for people who want a pet they can hold. Wary and nervous, the Green Basilisk does not respond well to handling. It also requires a relatively large amount of space for its size, making it best
suited for experienced reptile keepers. This spectacular-looking lizard can reach up to three-feet in length (most of it tail), though most will be smaller. Female Green Basilisks
do not grow as large, and they lack the prominent fins seen in males. A Green Basilisk will reach sexual maturity within 18-24 months. Males should be separated before five months, since they are likely to fight. Although not the right lizard for everyone, Green Basilisks will do well when cared for properly, and may even live longer than ten years.

Enclosure:
A Safe Place With A Vertical Orientation :

Green Basilisks are nervous animals that are likely to take off and run at full speed in their enclosure when frightened or
alarmed. In these cases, they can run directly into the glass of a tank, which apparently isn't readily visible to them. In light of this, it's a good idea to house them in a tank with
opaque glass or paper attached to sections of the glass. (This is especially true of younger and wild caught animals.) An enclosure of at least 60" x 16" x 36" should be used to
house a single adult, or a small group of one male and up to three females. Since Green Basilisks are arboreal, their enclosures should include large sturdy climbing branches.
Live plants are a good addition to an enclosure, since they mimic the lizard's natural environment and help maintain humidity levels. Acceptable plants include Pothos,
Philodendron and Dracena. Arranging plants in groups to provide a hiding place will make a Green Basilisk feel more secure. In addition to hiding places, the enclosure
should include basking spots. A Green Basilisk likes to be by water, so provide plenty of it with a large water bowl, and waterfall terrarium decoration.

Substrate:
Humidity Retention, Easy Cleaning Essential:

Green basilisks will do well with a variety of substrates, including commercially prepared soil, mulch, peat moss, bark and reptile substrate mixes. Any substrate chosen must retain humidity without molding, and be easy to clean. A Green Basilisk's enclosure should have 2-3 inches of appropriate bedding. This will help maintain humidity levels and support live plants. This bedding should be cleaned daily, and replaced monthly. If a Green Basilisk shows a tendency to eat bedding, the substrate should be switched to something edible, paper or indoor/outdoor carpet.

Temperature:
Thermal Gradient:

Although from Central America, Green Basilisks are
tolerant of relatively cool nighttime temperatures (mid-60s to low 70s). However, the temperature in their enclosure should never be allowed to go below 65 degrees. During
the day, a thermal gradient should be provided, with one section of the enclosure being "cool" at about 75 degrees, and the warmer end being about 85 degrees. A basking spot
of 95-105 degrees must be provided. Care should be taken to avoid making the basking spot too hot, especially in smaller enclosures. A combination of lamps and heat emitters
can be used to maintain the desired thermal gradient. Under tank non-light-producing ceramic heat emitters can be used to achieve nighttime temperatures without disturbing the on/off light cycle. Thermometers should be positioned in the warmer and cooler areas of the enclosure as well as in the basking spot.

Humidity:
Think Tropical:

A Green Basilisk requires relatively high humidity levels in its
enclosure. At least 60-70%, and preferably higher, must be maintained. This can be accomplished by misting the enclosure once a day or every other day, and using live
plants. A hygrometer should be used to measure humidity levels. Care should be taken not to create an enclosure environment that is too humid, since this will promote fungal
infections and jeopardize the health of the Green Basilisk. Signs that an enclosure is too humid include: substrate that appears soaked or saturated, rather than just damp, and
moisture build up on the sides of the tank.

Diet:
Keep It Varied:

The Green Basilisk does well eating a variety of commercially
available insects, including crickets, mealworms, grasshoppers and the occasional waxworm. Some Green Basilisks will also accept pinkie feeder mice, but these should be offered only as a special treat. Adult Green Basilisks should be fed 6-7 times a week and young basilisks should be fed twice a day. All insects should be gut loaded before being offered to the lizard.  Green Basilisks should also be offered dark leafy vegetables like collard, turnip and dandelions that are washed and cut.
Small amounts of fruits such as bananas, figs and mangos can also be offered as an occasional treat. Important -- It is necessary to provide calcium and vitamin supplements as part of the diet. Please read the supplement section below:

The following is a possible supplementing schedule for this reptile. Insects should be dusted with a supplement once or twice a week for adults. However, this is only a general suggestion -- the best specific schedule may vary depending on the supplement products used and other factors. Please consult product package directions, outside literature and a veterinarian to determine the optimal supplementing program.