Killer ducks target rare pūteketeke chicks in New Zealand's Mackenzie basin

Three mallard ducks have been euthanised after attacking and killing newly hatched pūteketeke chicks in Canterbury's Mackenzie basin. The unusual predatory behaviour was spotted near Lake Alexandrina, south of Lake Tekapo, leaving conservation experts concerned about its potential spread.

The ducks were seen actively hunting for pūteketeke nests and eating the chicks alive. This behaviour surprised Department of Conservation (DOC) staff, as mallards usually feed on plants and insects rather than other birds. Adult pūteketeke did not recognise the ducks as a threat and failed to defend their young.

A witness reported the attacks and provided photos to DOC, helping to protect the remaining chicks. Staff quickly removed and euthanised the three ducks before checking for others showing similar behaviour.

The pūteketeke, a native bird classified as nationally vulnerable, now faces an unexpected risk. Conservationists worry that other ducks may learn this behaviour, increasing the danger to vulnerable chicks.

The incident marks the first recorded case of mallard ducks preying on pūteketeke chicks in New Zealand. DOC has taken action to prevent further attacks, but the situation highlights a new challenge for protecting the endangered species. Monitoring will continue to ensure the safety of remaining nests.