yeah but i think they're native to tropical areas, is that what u meant sdaji?
koubee is in melbourne so they might not be naturally occurring down there.
In part, yes. Something being native doesn't at all mean that it should be released outside of its range, or even away from the immediate area it was collected from. There are feral populations of native Australian animals within Australia, including several species of frogs. The original climates the animals come from don't always mean much either. A frog found in southern Australia, including Tasmania, Limnodynastes tasmaniensis was released into areas in the NT and established populations. A frog found in northern Australia, NSW and QLD, Litoria fallax, has become established in many areas around Melbourne (a long way south of its natural distribution and with a colder climate than anywhere it naturally occurs).
It's not just establishing new populations which is a problem. If I was to release a whole lot of Brisbane Carpets in Darwin, they might be very successful, with their genetics infiltrating the local population, resulting in the Darwin Carpets no longer looking like Darwin Carpets and having physiological differences from what nature allowed/intended.
One of the worst weeds in central southern Victoria is native to eastern Victoria. Amazing but true! The Sweet Pittosporum. If it sounds difficult to believe that a native Victorian plant could become a serious weed in Victoria outside its natural range and you don't believe me, just google "Sweet Pittosporum" and you'll get lots of Australian weed sites coming up explaining the situation. It's incredible what can happen when a species gets outside of its natural range, even if it is only a tiny way, or even if it is from a different area within the distribution of the species.
Stick insects, including native species in Australia, sometimes cause devastating damage to forests (they eat trees). Not quite as severe as locust plagues, but from time to time they do defoliate forests to a severe extent. Severe defoliation caused by stick insect species such as Didymuria violescens has long been well recorded on a fairly regular basis, and this is
within their natural range. Common sense should tell you that releasing herbivorous insects into the wild is a dangerous thing to do. Imagine if I suggested I was going to breed and release Australian plague locusts!
Never, ever, ever release animals into the wild unless you know exactly what you're doing. Even the government approved projects which involve the release of animals go bad in the majority of cases, and they are usually researched by teams of people who are supposedly experts in the field of ecology, not to mention that they usually involve the release of native animals into their natural distribution. I doubt koubee has a large team of ecologists researching her suggested project, and obviously there isn't a valid reason to do it even if you do ignore the risks.
