3) Lizards without tails lose strength, dominance and “territory” to bigger, fully-endowed lizards. 2) When a lizard’s tail grows back, the new tail is going to be smaller and less colorful than the original. 1) Lizards who have tails can run faster than those without tails. The moral of this tale? When threatened by predators, tuck tail and run.

Geckos and other lizards not only shed their tails to confuse predators (or people), but their tails’ movements suggest they literally “have a mind of their own,” Canadian researchers have found.
Quotation from CBC News, Technology and Science section

Has 3 lizard tails and a baseball card in my backpack.
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