The olm is a blind salamander found only in the caves of the Dinaric Alps. Like the axolotl, it never metamorphoses, and its maximum lifespan has been estimated at ~102 years. Olms would occasionally wash out of caves during floods and were once believed to be baby dragons in Slovenia.

The common cockchafer spends its first 3 to 5 years below ground, growing as a larva. Then, all at once, these beetles emerge as adults in great numbers during spring. They clumsily buzz about, using their frilly antennae to find mates and reproduce — they live for only 6 weeks in this form.