Complex sentence: A further category of even more careful nature preservation exists within Sjeverni Velebit, the special reservation Hajdučki i Rožanski Kukovi, under the highest nature protection available in Croatia.
Split into simpler sentences: A further category of even more careful nature preservation exists within Sjeverni Velebit, the Hajdučki i Rožanski Kukovi. Hajdučki and Rožanski Kukovi are under the highest nature protection available in Croatia.