it's actualy a sign of stress. This behavior is only found in captivity... obvious reason. I've read (Mellisa Kaplan ..maybe?) a study showing spinial damage in long term captive lizards that were directly attributed to this. Basicaly stated..the poistion they put themselves in puts un-due physical stress on their tail. Their tails are not designed to support weight in this manner.
With that said.. even in my 150gal set-ups I still see it happen. My adults rarely do it, if ever. But my sub-adults & little ones do it consistantly. This behavior is primarily done during sping. It's less fequently done throughout the rest of the year. I belive the length of captivity, environment provided, and potientialy pubesence are all factors. My very first Uro did this so badly, he developed sores-blisters on the bottoms of his front paws that required antiboitic treatment. He was trying to "Take on" a Bearded Dragon that was in a seperate tank 2 feet away. I no longer have my BD's so I could concentrate on Uromastyx.
Just a choice I had to make.
I post this.. not to scare anyone.. but rather to pass along. I have not noticed any spinial problems... just something I read. The rest is from first hand knowledge. Personaly, I don't belive the climbing will cause damage in the short term , except you may want to keep a check on their feet. I hope this behavior will cease with age, like my adults. But I will continue to discourge it whenever and however I can.
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Jason
Blackdog Uromastyx Pics



