Main Content Anchor

Information about avian botulism at Lardelli Park Lake

Published on 07 May 2019

Following reports of recent duck fatalities at Lardelli Park Lake in Putney, Council commissioned environmental consultants to carry out an independent surface water and sediment assessment to determine the cause.

The report has confirmed the presence of naturally occurring avian botulism in the lake. Avian botulism is a commonly-occurring disease affecting birds.

Contributing factors include:

  • the season
  • elevated surface water temperatures and shallow surface water depth
  • freshwater/low salinity
  • the pH of surface water and sediments.

A hydrologist will review the ecosystem of the lake and determine if any modification may be required to the design of the lake and explore alternative options available to mitigate future outbreaks.

In the meantime, residents and visitors to Lardelli Park are reminded to keep their pets on a leash at all times and avoid touching or feeding wildlife. Avian botulism is not contagious. Pets are at risk only if they consume infected birds. Council encourages any pet owners with concerns to contact their local veterinarian.

Council staff will continue to monitor events at the lake. Residents are encouraged to contact City of Ryde on 9952 8222 (including after hours) to report any bird fatalities and ensure immediate removal.


Last updated on 7 May 2019