The sudden deaths of ducks in a backyard setup in South West Victoria led to the discovery that avocado fruit is harmful to ducks.
The investigation began in April 2025 and was conducted by Agriculture Victoria to determine the cause of death, which was attributed to the toxicity of Persin, a natural antifungal toxin found in avocado leaves, bark, skin, and seeds. It is generally harmless to humans but highly toxic to birds, horses, and ruminants.
The investigation was prompted after a farmer reported 7 of their 18 ducks had died, all within minutes of each other. Discussion with the owner uncovered that the last feed, approximately 6 to 7 hours prior to the deaths, had included 6 whole avocados.
The community is encouraged to report any unusual signs or suspected cases of emergency
Animal disease immediately to the Emergency Animal Disease Hotline on 1800 675 888.
