The 
photo shows a weka eating a dead rat. This shows how important it is to use the correct poison to eradicate rats and mice and may be a contributing factor in the decline in bird numbers .We also have evidence of a weka feeding its chicks from a dead rat .
To avoid “Secondary Kill” the bait to use is called RACUMIN (this contains the active agent COUMATETRALYL) which removes the possibility of secondary poisoning to pets and wildlife including weka. Follow the directions on the packet to fix the sachet to a tree with a nail, or clip to a heavy object so the rat cannot take it away.
Racumin is available at most hardware stores such as Mitre 10 or you can purchase it at cost from WekaWatch (phone 2922512)
Remember that dogs are a threat to the survival of weka and it would be appreciated if owners could keep this in mind when walking their dog .