The giant horned lizard (Phrynosoma asio) is a species of phrynosomatid lizard which is endemic to the Pacific coast of southern Mexico. It is the largest horned. Range Description: Range extends from Colima, Mexico, along the Pacific side of Mexico to Chiapas. There is one record from Guatemala, based on a collection. The giant horned lizard (Phrynosoma asio) is a large, hardy species of Horned Lizard. Care sheet provided by Black Moon Reptiles.


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Intermediate Housing The most advisable terrarium to use when phrynosoma asio a Phrynosoma is glass which provides medium-high ventilation. This allows us to maintain both a good temperature and good ventilation.

A terrarium made of PVC can also glass would phrynosoma asio the preferred choice considering its properties.

Giant horned lizard

The terrarium should be longer and wider than it is tall, 1. As the Phrynosoma is an active animal it is advisable to use a large tank in order for them to move freely, as well as making sure that the terrarium contains a cool area amongst its hotter zone in order for the animal to be able to go through thermoregulation.

Hide box Phrynosoma tend not to hide in very deep shelters, they usually rest on branches, or make a small bed between rocks and sand, so a cave or shelter is phrynosoma asio necessary as used for Australian geckos and phrynosoma asio geckos.

Substrate The substrate should consist of a mixture of fine sand and earth, with a layer of about 0.

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It is also important to place various sized phrynosoma asio and branches in the terrarium in order phrynosoma asio the animal to be able to seek refuge and climb. Lighting — Heating t is important to maintain the Phrynosoma in an environment close to its natural one, so therefore the lighting must be intense and of high quality similar to their own habitat.

A flat stone phrynosoma asio rock should be placed under the hot spot in order for the animal to be heated well. A minimum of hours a day of light is needed between the months of January-April which phrynosoma asio needs to increase to hours a day between May-October.

If you are able to expose the Phrynosoma to natural sunlight, with the confidence that they cannot escape, and have shaded areas, it is a good opportunity to do so as the natural sunlight is extremely beneficial for both their organism and metabolism.


Water Phrynosoma will gain much of the water they need from their food, but as we have pointed out earlier it is desirable to spray them twice a week in summer, and phrynosoma asio couple of times per month in the winter to obtain the required amount of water needed.

As in almost all reptiles, it phrynosoma asio advisable to give access to the animal a shallow bowl with clean fresh water daily. Humidity Between the months of May to October it is important to frequently spraying the terrarium a minimum of twice a week.

With this way you are replicating the raining season.

Giant Horned Lizard - Phrynosoma asio - Overview - Encyclopedia of Life

We can also spray the phrynosoma asio of animal as they are able to absorb the moisture through their skin and they can also drink this excess moisture when water is poured onto them. Between the months of October to April it is only necessary to spray the terrarium once or twice a month. In captivity phrynosoma asio is not necessary to provide ants, since there are now several commercial products made specifically to supplement the lack of formic acid.

Whilst giving substitutes of formic acid, we can include ants as well as other insects in their diet safely which are available in most reptile stores.


After a few days, the eggs began to desiccate. Under these conditions 11 of the 20 eggs withered, appeared nonviable and were discarded.

The incubation temperature was reduced to The vermiculite-to-water ratio was doubled to 2: In June, the summer Specific humidity levels were not determined. Under these light cycle was increased from 8 to 12 h. Davis and Dixon or June and July in captivity Baur The first egg hatched after days; the last egg after days.

In our group, breeding took place on 20 July The female The neonates took several days to fully emerge and phrynosoma asio displayed to the males by holding her tail up vertically and appeared static and lifeless.