Kahu (Australasian harrier)
Have been reported dead occasionally presumably from secondary poisoning, after 1080 operations on rabbits (Spurr & Powlesland 1997; Batcheler 1978) although was not the case in another study (Pierce & Maloney 1989)- Were seen feeding on possum and wallaby carcases after a 1080 operation on Rangitoto Is, but none were found dead (Miller & Anderson 1992)
Batcheler CL. 1978. Compound 1080, its properties, effectiveness, dangers and use. Report to Minister of Forests and Minister of Agriculture and Fisheries. Unpublished NZ Forest Service Report
Pierce RJ., Maloney RF. 1989. Responses of harriers in the MacKenzie Basin to the abundance of rabbits. Notornis 36, 1-12
Spurr & Powlesland 1997 (PDF 149 KB)
Miller & Anderson 1992 (PDF 94 KB)
Karearea (N.Z. Falcon)
May be susceptible to secondary poisoning by eating poisoned birds or small mammals (Spurr & Powlesland 1997)- A single karearea territory was monitored during a 1080 operation in Pureora in 1984 (Calder & Deuss 1985), and karearea remained.
Calder B., Deuss F. 1985. The effect of 1080 poisoning on bird populations in Motere, Pureora Forest Park, winter 1984. NZ Forest Service internal report (unpublished) 39p
Ruru
Have been found dead after operations using carrot and cereal baits (Warren 1984; Spurr 1991; Spurr & Powlesland 1997)- Monitoring by 10-minute counts in Waipoua in 1990, showed ruru not affected by 1080 operation (Pierce & Montgomery 1992)
Warren A., 1984. The effects of 1080 poisoning on bird populations in Tihoi, Pureora State Forest Park, winter 1983. New Zealand Forest Service internal report (unpublished). 34p
Spurr EB., 1991. Effects of brushtail possum control operations on non-target bird populations. Acta XX Congressus Intrnationalis Ornithologici: 2534-2545Pierce RJ., Montgomery PJ. 1992. The fate of birds and selected invertebrates during a 1080 operation. 121. Wellington, Department of Conservation
Spurr & Powlesland 1997 (PDF 149 KB)
Weka
Weka are known to eat both carrot and cereal baits (Spurr 1993). They have been found dead occasionally after 1080 operations (Spurr 1994b)- In 1994, 24 radio-tagged weka were monitored during cereal bait operations. One was found dead, the other 23 were alive 4 weeks after 1080 application (Walker 1997; Spurr & Powlesland 1997)
- In a further study 8 radio-tagged weka survived aerial application of Wanganui No. 7 cereal baits (Spurr & Powlesland 1997)
- Green baits less attractive to weka, hence offer some degree of protection (Hartley et al. 2000)
- In another study, 15 radio-tagged weka survived 1080 operation, though 5 died before it, some by stoats (Van Klink & Tansell 2003)
- From the existing literature it appears there is a small risk of weka being poisoned as a result of 1080 aerial application.
Spurr EB. 1994b. Review of the impacts on non-target species of sodium monofluoroacetate (1080) in baits for brushtail possum control in New Zealand. In: Seawright AA., Eason CT. (Eds.), Proceedings of the science workshop on 1080. Royal Society of New Zealand, Wellington, pp. 124-133
Walker KJ. 1997. Effect of aerial distribution of 1080 for possum control on weka, great-spotted kiwi, morepork and fernbird. Ecological Management 5Hartley L., Wass J., O'Connor C., Matthews L. 2000. Colour preferences and coloured bait consumption by weka Gallirallus australis, an endemic New Zealand rail. Biological Conservation 93, 255-263
Spurr & Powlesland 1997 (PDF 149 KB)
Spurr 1993 (PDF 61 KB)
Van Klink & Tansel 2003 Weka and 1080 (PDF 60 KB)