HG man....where in central king country??? kaitieke was my home for my teen years and my findings are very similar to yours...
but the buffer thing...when we were all out shooting trapping possums there WAS a buffer ...any easy to get to land/farm land got hammered...so it created a buffer.... isnt that what TB control needs??? low numbers of ferals on farm edges. I know of a VERY big station in central north island that has just discovered they have a major TB issue.
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