When a spinysaur has grown enough it will evolve into a spikysaur.

They are known as lone wanderers throughout the deserts.
There are many old trails they follow, leading them through all parts of the land.
Buried during the day, they can spend hours and hours walking with the energy they have absorbed during the day.

If they need some they seem always be able to locate the nearest watersource.
Following them has led some thirsty souls to an oasis, while others that had mistaken a buried spikysaur for a water cactus were in for a nasty surprise when they tried to cut it.

They wander alone until they find a suitable mate, with wich they will stay then until they evolve together.