Ducks Euthanized After Preying on Native Pūteketeke Chicks
In Canterbury’s Mackenzie Basin, three mallard ducks were recently euthanized after they preyed on native pūteketeke chicks. The incident occurred near Lake Alexandrina, close to Lake Tekapo, and drew significant attention from the Department of Conservation (DOC). This event marks a rare case of ducks exhibiting predatory behavior towards other birds, particularly concerning given the pūteketeke’s vulnerable status.
Ducks Euthanized for Preying on Pūteketeke Chicks
The Department of Conservation received alarming reports when a local individual submitted graphic photographs of mallards attacking and consuming freshly hatched pūteketeke chicks. Dean Nelson, DOC’s principal biodiversity ranger, expressed dismay over the situation, indicating that such behavior is typically uncharacteristic for mallard ducks, which primarily feed on plant materials and insects.
Background on the Pūteketeke
- Scientific Name: Australasian crested grebe
- Status: Classified as nationally vulnerable in New Zealand
- Recent Attention: Gained prominence after winning the Bird of the Century crown in a campaign led by comedian John Oliver
Nelson recounted observing the ducks actively seeking out pūteketeke nests, raising concerns about potential future instances. He stated that the adult pūteketeke do not perceive ducks as threats, further complicating the vulnerability of their chicks.
Concerns Over Duck Behavior
This unusual predation is reminiscent of a 2017 incident documented by a Cambridge University researcher. The study highlighted a similar instance in Romania where mallard ducks attacked chicks of other bird species, suggesting a shift in dietary behavior possibly due to nutritional needs during the breeding season. Nelson remarked that it is crucial to monitor this unexpected behavior as ducks may learn from one another.
Community Engagement and Conservation Efforts
The DOC praised the efforts of the individual who reported the predation. Nelson emphasized the importance of community involvement in conservation, stating, “This is a great example of people taking action for nature.” The DOC encourages the public to remain vigilant and report any unusual wildlife behavior, as their rangers cannot be everywhere.
Monitoring and Future Precautions
In light of the incident, DOC staff apprehended the three aggressive mallard ducks and humanely euthanized them. To prevent further occurrences, rangers are scheduled for follow-up patrols to ensure no other ducks exhibit similar behavior.
Visitors to Canterbury’s Lake Benmore have also been alerted to watch for pūteketeke, especially throughout the summer months, given reports of nest disturbances in the area. The local colony has consistently produced 40 to 50 nests annually over the past five breeding seasons, although observed breeding patterns have shifted recently.
As the situation unfolds, collaborative efforts between the DOC and the community remain vital in safeguarding the interests of vulnerable species like the pūteketeke.
