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quote:Originally posted by MayoFlyFarmeri guess i don't know how bad the possum problem in NZ is. and as "someone" pointed out, I'm sure that an isolated island like NZ is more suceptable to such problems; but for discussion's sake I'd like to mention just a few of the invasive species that cause headlines in my neck of the woods:-sea lampre-zebra muscles-milfoil-crap, I'm blanking on the name of this one. some sort of purple flower that you see all over the highway sides-Asian beetlesAre YOUR mice nude? 
quote:Originally posted by margaretDo other countries have invasive species that do as much damage as possums do in NZ? We have 70 million possums that chew their way through tonnes of leaves, fruit, flowers every night. They are driving some native species to extinction. This can be by direct competition or domino effect eg eating fruit that native birds normally eat OR by a cascade effect, eg they eat the leaves and the birds that need the seeds don't get them because the tree is so sick it does not flower. Once possums find something they like they just keep eating it until it disappears. Unfortunately our possums are bigger and healthier than in their native land and breed all year round.