Great decision to visit Canary Islands. Well here everything is kind of in the vicinity, considering that you can take an airplane and fly from one island to the other in 30-50 minutes :-)I'm glad you enjoyed the read in such way @ervin-lemark !
Loro Parque and Siam Park are both located on the isle of Tenerife. If you're not a wind surfer, I'd even say that Tenerife is the more attractive island compared to Fuerteventura, especially if you haven't been to the archipelago yet. But well, you can't do anything wrong visiting one of the seven islands anyways :-)
Muchas gracias a tí!