Almost korsica rivers have these properties: big drop, blocking parts, less flow, rock gorges far a way from civilization.
Optimum date is up to May or after autumn rains for paddling. Be carefoul on change of water level - 5cm can make a river impassable! Do not paddling in gorges during rain - rocks are slippery for scout or transport!
These information are from book "Kilometráž korsických řek" - Pavel Lichtág.