(to read this current scientific paper in full, click on the line above)
This revealing research shows that only the following predators endanger nestlings especially of native birds:
The Norwegian Ship Rat, the Brushtail Possum, the Harrier Hawk and to a lesser extent Thrushes and Quails.
Cats are not even mentioned as predators in this context
Very interesting reading!
(to read why one important manufacturer in New Zealand had to withdraw their products from the market, click on the line above)
When you have read it you really wonder how many of our pets are running around with those useless microchips implanted and with their owners unaware.