The effect of aerially applied 1080 on the nesting success and survival of kākā
Kākā (Nestor meridionalis) are vulnerable to predation by stoats (Mustela erminea) and possums (Trichosurus vulpecula), particularly when nesting. Without predator control kākā populations decline. Control of stoats and possums both by trapping and aerial application of the poison 1080 leads to increased kākā nesting success. In recent years, many 1080 poison operations have been undertaken to control ship rat (Rattus rattus) and stoat plagues that occur after beech mast. Kākā do not breed every year but breed in anticipation of heavy fruiting.