Care sheet for the Tegu. Note some species will differ some on requirements. This care sheet will be for four of the common species available in the pet trade.
Hatchling tegus will all take the same food up until about one year in age. Of these the Tupinambis merianae, Common name (Argentine Black and White), (Giant Tegu) And the Tupinambis rufescens, Common name (Argentine red Tegu), (Red tegu) will change feeding habits. The Blue Tegu (It is said to be Tupinambis teguixin, but the classification has not been scientifically determined.) And the Tupinambis teguixin, Common name (Colombian Black and White), or (Gold Tegu) Will stay on a carnivorous diet throughout their life.
Food: All Tegus are carnivores as hatchlings, which means they only eat meat. Crickets dusted with vitamins dust , Captive raised roaches, Mealworms, Super mealworms, ground turkey dusted with vitamin dust, Pinkie mice and cooked egg (Not raw) scrambled or hard boiled. Please remember to remove any food that is not eaten right after your tegu has eaten his/her fill. Insects are well known for stressing reptiles. This also will help keep their cage cleaner. Adult tegus, For the Argentine Black and White and the Argentine red Tegu. They will take ground turkey, cooked egg (Not raw) scrambled or hard boiled, rodents, fresh fish (Not from a pet shop, due to the chemicals used in these tanks), baby chickens, grapes, tomatoes, strawberries, melons, and just about any other soft fruit. s can be given as well, but not as a staple diet, only in moderation. This is due to the high content of potassium (Known for not binding with calcium). Not more than once every couple of weeks. They also tend to have a very high phosphorous levels. The Blue Tegu, and the Colombian Black and White, or (Gold Tegu) will take all of the above, except fruit. Also I suggest feeding only killed rodents. Live rodents can bite your animal. Dead do not, it is just not worth the chance. My choice of vitamin dust is Herpitive or Fluker's. A side note on feeding: Tegus can get cage aggressive. They can get to where they will associate their keeper with food. There are a couple of ways to keep this from happening. The first is to feed your tegu in a separate cage or area than his home. Have the food there when you put him with it. Another way, would be to feed him at night or when he is in his hide. Then he will not see you with food. The first suggestion is the best for a few reasons. One you handle him every day, which helps with the taming process. Another reason would be to remove all chances of him ingesting substrate. And last, but not least, the food would be fresher than feeding at night.
Water: Tegus require fresh water on a daily basis. It also would be recommended that their water dishes/bowls be big enough to soak in.
Housing: Hatchlings will do great in a 20 long tank, but they will outgrow these fast. As an adult they require a much larger enclosure. I house mine outside in a 8 ft x 8 ft enclosure. Inside I use a 400 gallon showcase. If building your own cage, remember that these lizards are terrestrial (ground dwelling), So height would not be a necessity. I recommend at least a 6 feet long, 3 feet wide and 3 feet high.
Humidity: Tegus require high humidity level 60%-70% for proper shedding as well as proper health. Misting on a daily basis is required. If you have another way to raise the humidity, that is fine. Remember not to have the substrate tacky.
Substrate: I recommend using cypress mulch, orchid bark, Lizard litter, Repti-bark or eucalyptus mulch. These should not be dusty dry or wet. You can mist them a little to keep the dust down, this will also raise the humidity. Make sure it is not tacky, as to stick to their feet. Also your tegu needs to be fed where he will not ingest these substrates. You do not want him to have a intestinal blockage.
Lighting: Ultraviolet light with a full-spectrum of light is recommended. Lights that emit UVB is a must for this species of reptile. Ultraviolet lighting is important in the production of vitamin D3, which is necessary for calcium metabolism. There are some people that claim added vitamins of D3 would be a good substitute, however I do not. I do use multi-vitamin dust. But I do not depend on it for a substitute for UV lighting.
Just a little add on of one I wrote. It doesnt even begin to compare with Bobby's.
Introduction and Handeling
The Argentine Red Tegu is normaly just shortened to Red Tegu. The scientific name of this species is Tupinambis rufescens. They habitats stretch from centeral Bolivia all the way over Western Paraguay into western Argentina. They can be found in the tropical southern Amazon all the way to more temperate regions. The winters are cold and these animals can hibernate during the winter. On average these animals live 15 years, but 20 year lifespans hav been heard of. They normaly hit around 4 feet, but there have been records of 4.5 foot males. They can weigh up to 20 pounds or more.
As far as handeling goes these guys are great about it. As babies they rarely bite, but will tail whip from time to time. Most as adults are very friendly and will regularily want to come out of their cage to "play". I have heard and witnessed many people taking their Tegus outside on "walks" to get some UV. Handeling does take some getting used to as babies. It is not unheard of for babies to be very skittish and somewhat aggressive(although as I stated earlier they rarely bie).
Housing
Housing on these animals can be very difficult to accomidate for. As babies a pair can be housed in a 40g breeder tank. Although this is not really reccomended as there is sometimes mutilation that can occur. An adult must have a bare minimum of 8x4x3(LWH). They do not climb much so height really isn't the most important thing but you will need at least 3 feet of heighth(find out why later).
I find that the most appropriate substrate is Cypress mulch. Make sure that there is enough in there so that the animal can burrow. 6" is normaly the best amount for babies and a 12" is best for adults(hence the 3 feet of height).
As far as decorations go you don't really need to be too extravagant with this. Put something in there so that the can climb at least a little bit(although many won't). They need a water bowl that they can completely submerge themselves in. As babies this is not problem, but as adults this can be hader to find. I reccomend a cat litterbox filled to the brim. Make sure that the water is on the hot side to help with humidity and to keep it warmer.
Hides are a definate. These guys will not always use their hides as they like to burrow, but they should be given the oppurtunity. As adults a cardboard box flipped over works just fine. Make sure one hide is on the cool side and one at or near the hot side. I say near because your hot side may be completely a water bowl.
Temperature, Lighting, and Humidity
I will say it again and again, but I believe the key to keeping any reptile is what...thermoregulation. Meaning that you have a hot side and a cool side so that the animal can pick its own temperature.
A good basking temperature to maintane is about 110-120 degrees farenheit. With breeding animals(especialy females) the basking temperature should be raised to 120 plus. This allows the reptile to digest its food items much easier and quickly. The cold side of the enclosure should be about 80-85 degrees. The hot side should be fine as long as you maintain these temperatures stated above.
A full spectrum of light is required for these animals. I reccomend a 10.0 UVB Reptisun bulb. This helps the animal produce D3 through the light source. Some people say that the animal is fine with just supplementing with UVB, but I find that it's better to be safe than sorry.
These guys need a lot of humidity. The humidity needs to be at least 75% and can go all the way up to 90%. This may be hard to do in some enclosures to what I do is place the light in the enclosure(far enough away that the animal can't reach it) and put a plastic lid over the entire container. I also place the basking bulb directly over the water dish to help get the correct humidity levels.
Hibernation
I don't know much about the hibernation of these animals as I have not had to go through it before. What I do know is this-
These animals can and probably will hibernate. Make absolutely certain that the animals has not eaten a week prior to hibernation. The food will literally rot in their stomach if they have. Start to slowly reduce the amount of light they get during the day and their food intake and eventualy they will have very little light(about 8 hours a day) and no food. Your animal may come out during hibernation(brumation is the technical term). He will be very sluggish and slow. Do not feed him. When you are ready for your animals to come out of brumation start to length the light schedule. Until it is again at its original time length(about 12-14 hours a day). The first day that you leave the lights on for 12 hours feed your tegu.
I do not find brumation as a must unless you plan on breeding the animal. I plan on at least trying to keep mine out of brumation either until I want to breed her or she is older and I want to "expirement". Some people claim that it is impossible to keep their animals out of brumation so I guess I will just have to wait and see.
Feeding and Supplementing
When younger Reds will eat much more protien than they will fruits. A big mistake that first time keepers don't reilize is that these animals need fruit just as much as the need protien. Many will not start to consume it very often until a year old, but it should still be provided for those times that they do have the "sweet tooth". Some appropriate food items of these animals are as followed mice(of appropriate size), crickets, mealworms, superworms, silkworms, and other insects(not caught oustside), scrambled eggs, turkey, strawberries, grapes, and bannanas. Make sure to feed the animal(insects and other bugs) outside of its cage in another tank so that the animal does not accidentaly consume any of its bedding and possibly get impacted.
I can never stress enough how important supplementing is. These animals have a much better chance of surviving without it then most carniverous lizards, due to the amount of calcium in many of their food items(ie. pinkies). It is still very much needed. I supplementing everything my animals eat. I supplement calcium with no phosphorus or D3 daily(make sure there is no D3 because too much can poison the animal), I supplementing with bee pollen and calcium with D3 and no phosphorus every third day.
Maintenance
From what I've read these guys are pretty high maintenance, especially as adults. Due to the fact that they need a high percentage of humidity their cage needs to be misted a minimum of once a day(or other means of keepint the humidity high). They need their food chopped up daily. Remember too these are big animals, they are going to make well big poo. One really big part is the cage. You are more than likely going to have to build your own cage(or pay someone to do it). That can be hard work and can cost a bit. Even a simple 8x4x4 cage can take awhile to build.
They also require a soak once every 2-3 dys. Fill the bathtub up just enough so that the animal can completely submerge itself. Let it sit in there for about 15 minutes and your good to go.
Purchasing
Many reptile dealers are scam artists. They'll sell their animals no matter what they have to do to get rid of it, even if it means lieing to you. So, you want to make sure your animals is healthy when you buy it. First off check for signs of dehydration such as ruffled skin. If you pinch the skin(lightly) it should fold back into place. Make sure that the animal is not skinny. Check for protruding bones such as the spine of hips. Make sure the leg muscles aren't drooping. Check for fece smears on or near the cloaca(rump). This could mean that the animal has diahria and is probably sick. Ask to see if the eat. If it has already been fed it may be a good idea to come back again at a different feeding time. Make sure the animal is active. It should not be laying down on the ground not moving with its eyes closed. Lastly check for signs of respiratory infection. Make sure there is no gaping, runny eyes or nose, crusty lips, ect.
Sexing and Mating
Sexing at a young age with this species is somewhat hard. They can be probed, but if you are not an expierienced owner it really isn't recomended. As adults it is very easy to sex these animals. Adult males will be a lot bigger and much more colorful. They will also have much more pronounced jowls(their "cheeks"). From what I've read they also have spurs by their cloacal opening, but don't quote me on this. Females will againg be much smaller and have very dull colors. They will have much smaller jowls than the males and lack spurs.
Mating is something I know next to nothing about so stick with me here. What I do know is that after hibernation the femal and male should be inroduced. They will copulate(which is normaly a very rough affair) and the female will produce 4-6 eggs. Thats pretty much it. Females will be much more aggressive after laying eggs for the rest of the year so do not keep them with any other Tegus or you are very likely to have a hurt or dead Tegu.
Hatchling Care
Hatchling care is pretty much the same as with adults. There are a few differences though. They require less substrate. 5-6" should suffice. Their food items are just a little bit smaller and they don't require a huge cage like adults. Minimum is a 40g breeder. They are only about 5-6" long after all.