▁this ▁air port : ▁ 7 8 % ▁single - engine , ▁ 1 1 % ▁multi - engine , ▁ 6 % ▁jet , ▁ 4 % ▁hel ic opter , ▁and ▁ 1 % ▁ul tr al ight . ▁ ▁References ▁ ▁External ▁links ▁▁▁▁ ▁Gut hr ie – Ed mond ▁Regional ▁Airport ▁( G OK ) ▁at ▁Oklahoma ▁Aer onaut ics ▁Commission ▁ ▁Aer ial ▁image ▁as ▁of ▁April ▁ 1 9 9 1 ▁from ▁US GS ▁The ▁National ▁Map ▁▁▁ ▁Category : A ir ports ▁in ▁Oklahoma ▁Category : Build ings ▁and ▁structures ▁in ▁Log an ▁County , ▁Oklahoma ▁Category : G ut hr ie , ▁Oklahoma <0x0A> </s> ▁The ▁can e ▁to ad ▁in ▁Australia ▁is ▁regarded ▁as ▁an ▁exempl ary ▁case ▁of ▁a ▁" fer al ▁species " — oth ers ▁being ▁rabb its , ▁fo xes , ▁c ats ▁and ▁dogs . ▁Australia ' s ▁relative ▁isol ation ▁prior ▁to ▁European ▁Col on isation ▁and ▁the ▁industrial ▁revolution — both ▁of ▁which ▁dram atically ▁increased ▁traffic ▁and ▁import ation ▁of ▁novel ▁species — allowed ▁development ▁of ▁a ▁complex , ▁inter dep ending ▁system ▁of ▁e col ogy , ▁but ▁one ▁which ▁provided ▁no ▁natural ▁pred ators ▁for ▁many ▁of ▁the ▁species ▁subsequently ▁introduced . ▁The ▁recent , ▁sudden ▁in und ation ▁of ▁foreign ▁species ▁has ▁led ▁to ▁severe ▁break down s ▁in ▁Australian ▁e col ogy , ▁after ▁over wh el ming ▁pro l ifer ation ▁of ▁a ▁number ▁of ▁introduced ▁species ▁for ▁which ▁the ▁continent