What to do

If you have a terrapin in your possession, belonging to an alien species, and no longer have the possibility/ will to care for it, do not release it into the wild. Please contact the authorities (e.g. Institute for Conservation of Nature and Forests - phone: +351 21 350 79 00) to obtain information on how to proceed (only in Portugal).
 
Likewise, if you want to buy a terrapin in a pet store, look up its specie, longevity and maximum size of growth. There are species that may live more than 30 years and grow considerably, so it is very important to consider them before you choose one as a pet.

 
Finally, if you encounter a terrapin belonging to one of the native species, do not take it home. Portuguese law prohibits the possession of any specimen belonging to native species.