there is lots of good info in that post : )
first things- this post has evolved into general discussion, and is not directed personally to the original poster. this is husbandry discussion, not meant to hurt feelings.
yes, we don't know for sure why this animal failed, internet diagnosis is a tricky thing; : )
and yet folks continue to post very generic "my lizard is sluggish, setup is perfect, what is wrong with him?". paraphrased, but that is the general gist. without significant detail- history of the animal, how long you have had it, how is it setup (got pics?), temps temps temps, how you measure temps, substrates, diets, etc, without that BASIC info, how can you expect to recieve/give a diagnosis?
in my experience, someone that posts a "what's wrong" post, and says stuff like "setup is fine/perfect" but without giving actual details, that keeper is most likely lacking the actual knowledge of what a "perfect" setup is. that's not a fault, we all started ignorant of husbandry, and i hope we all continue to learn, but that very type of post points to basic husbandry and care issues.
85% of the time, temps are a significant issue. folks don't understand them, or even how to measure them.
i have seen plenty of lizards bask at 140F. we see it all the time here at PE. i suggest 120F as a MINIMUM (not 140F) and 130F is a great target temp.
i can setup a temp gradient from the low 80's to 130F in 10 minutes in a 10 gallon or 20 gallon tank, no problem. it is not "too hard" nor "impossible", you just have to know how to do it.
as someone else mentioned, the key is an elevated basking spot. raising your basking spot UP to the light gets you easier temps, using lower wattage. i can pull that 130F basking surface temp using a 45-65 watt bulb. if your bulb doesn't have to throw the heat a foot or more, instead just a few inches, it is much more efficient.
we use these wood stacks, aka Retes Stacks, to create elevated basking spots:

inside an actual cage, in this instance a Uro cage, it might look like this:

the idea is to create a temperature GRADIENT, with different temp choices for the animals to use. in this Uro pic, that top temp is about 145F. they use it all the time. the next level down is about 135, then 120, then 110, then 105, it drops level to level, giving the lizards the choice of what temp to bask at. it also provides a secure hide spot at each level, so they can find safety and temperatures that they can use.
on the ground, six inches away from the stack, it is 85F.
with this type of stack, if set up in a 20g long tank, you have also increased the usable square footage of the cage by about double! more room for the lizard to roam and use.
yes, i have seen Beardeds use, and thrive, in this type of setup, with these temps. they do spectacularly. i have also had this temp discussion in other bearded forums where folks were REALLY resistant, only to see some keepers try upping their temps from 105 to 125 and see their Beardeds blossom with life. eating more, growing more, being MUCH more active, etc.
someone mentioned using a SPOT bulb, and that is actually the opposite of what you want to do. use a FLOOD bulb. it is VERY important that the lizard be able to fit their ENTIRE body into the "cone" of the light. they can't heat up one arm or kidney at a time, it is a whole body heating. when you have a narrow focus, one that doesn't cover the entire animal, that is when you get burns. an intense beam of light focused on just one portion of the body. the lizard is still trying to make use of the basking light, but can't, and one small spot (or half of the body) will literally overcook and burn.
when your bulb light encompasses the entire body, the entire animal can heat up as needed, quickly (given proper temps) and move on.
someone mentioned that basking for just 10 minutes should be a "sign". that is true. but what you see in the "sign" is different than what i see : )
in the wild, basking exposes the animal to predation. they have evolved to bask in these higher temps for a short period, grab all the heat/energy they need, and move back to safety. that is what they do. they are not evolved to bask for extended periods, that is slow boating it, and not allowing them to accomplish life goals.
you see this applied with snakes as well. a breeder will say that a snake that is NEVER on the heat tape, always seeking the coolest spot in the cage, is telling you that it is too hot. one that is ALWAYS on the heat tape is telling you that it is not hot enough. you can read the animal if you just look closely. the same thing applies to lizards. if they bask for extended periods, it is too cold, they are continually seeking heat. if they never use a spot, it is too hot. i have seen many types of lizard species use basking temps up to 160F or so. i have seen snakes (Boelen's pythons) use basking temps up to 110F. it is very interesting.
as for seeing Beardeds in the wild, i have not been so lucky to travel to Australia. but i know terrific keepers who have, and who have taken their temp guns along with them. temping actual basking spots where they find actual lizards basking. that was 15 years ago, and really what opened our eyes to ACTUAL temps, how to measure temps, what they mean, and how to apply them.
i was in Moab Utah a couple of months ago. no Beardeds running around, but plenty of Collareds, out and basking, in that same type of arid desert environment, and i temped the basking spots well into the 130s.
wow, that's a lot of typing. check out the linked FAQ here for more on the Retes Stacks.
Pro Exotics FAQ on wood basking stacks
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robyn@proexotics.com
Pro Exotics Reptiles
