A friend and I recently went hunting for green iguanas, an imported predatory species which is wreaking havoc among our local wildlife (birds, protected species parrots, "coqui" toads, among others) and also on fruits and other crops. Used an Air Force .22 cal PCP, an Air Force .25 PCP, a stock 1377 (underpowered for this task, unless heavily modified, needless to say) and a stock 2100 .177, all used JSB predator pellets. The 2100 did an excellent job but only for head shots, not even the Air Forces' could take these pests down unless we took a head shot.
These were imported as small, colorful lizards from Central America as "pets" but when they started growing to their full size, many people freaked out and started releasing them in the wild. Soon they started breeding (these things lay 35~50 eggs at a time, up to twice a year as far as we know - maybe more, and within a week the eggs hatch) and now their population is out of control and driving the local farmers and Government agencies insane.
Here's some pictures:
First hunt = 4 iguanas
Second hunt = 11 iguanas
... and many more to come !"if there's a will, you will always find a way"