This spermatophore is then stored and used to fertilize the eggs before they are laid. Thus, fertilization in salamanders is internal even though there is no direct cloacal contact. Tail Salamanders, like lizards, are capable of voluntarily shedding their tails if they are threatened, as a defense mechanism. The detached tail jumps and twitches violently due to muscle contractions, and diverts the attention of a predator long enough to allow the salamander to escape. The lost tail soon grows back.
Salamanders have remarkable regnerative powers which are unique among vertebrates.
They are capable of regenerating lost toes and even whole limbs. And since the locomotion of the salamander isn't dependent upon its legs, the loss of a limb doesn't handicap the salamander until it grows back.