Target pest: Helix aspersa (Stylommatophora: Helicidae), brown garden snail
Agent introduced: Turdus merula (Passeriformes: Turdidae), blackbird
Import source: Britain
Establishment: Distributed throughout New Zealand
Impacts on target: Not quantified
Cameron PJ, Hill RL, Bain J, Thomas WP (1989). A Review of Biological Control of Invertebrate Pests and Weeds in New Zealand 1874-1987. Technical Communication No 10. CAB International Institute of Biological Control. DSIR Entomology Division. 424p.