Page "Black rat" Paragraph 28

Large-scale rat control programs have been taken to maintain a steady level of the invasive predators in order to conserve the native species in New Zealand such as kokako and mohua.

Pesticides, such as pindone and 1080 ( sodium fluoroacetate ), are commonly distributed via aerial spray by helicopter as a method of mass control on islands infested with invasive rat populations.

Bait, such as brodifacoum, is also used along with coloured dyes in order to kill and identify rats for experimental and tracking purposes.

Another method to track rats is the use of wired cage traps, which are used along with bait, such as rolled oats and peanut butter, to tag and track rats to determine population sizes through methods like mark-recapture and radio-tracking.

Poison control methods are effective in reducing rat populations to nonthreatening sizes, but rat populations often rebound to normal size within months.

Besides their highly adaptive foraging behavior and fast reproduction, the exact mechanisms for their rebound is unclear and are still being studied.