On a recent visit to Hawaii, I hardly saw any native wildlife, a stark reminder that things haven't improved since I first came to film for the B.B.C. back in the early 1980s. Thirty five years ago I made my first visit to Hawaii at a time when travelling to distant tropical islands from the U.K. was considered exotic. In those days, you'd emerge from a plane into the shimmering light and once down the gangway steps walk to the terminal building with the heat of the sun bouncing beneath your feet like a playful pet; and just as you were…