[GSlob]

The bizarre plates and spikes that lined the backbones of the long-extinct stegosaur[us] were probably extreme examples of the often elaborate and colorful displays developed by animals to recognize fellow members of their species...
Well, it explains the genesis and function of punk hairdos.

[dhs12345]

What males will do to attract the females of the species. Or scare away other males that might compete for females.