Pam Andrew said on Thursday morning she came across two dead ducks beside a freshwater pond on her property, overlooking Hawksbury Lagoon.
On Friday, she came across four more dead ducks and on Saturday morning she discovered two paradise ducks which had both died.
"By the time Saturday came around, I looked out my window and knew it was another two dead.
"It’s horrible to have so many of them died so close together."
Ms Andrew contacted a Hawksbury Lagoon Inc member to let them know, and a postmortem examination had been organised, undertaken by the Department of Conservation, which recommended two of the ducks be frozen until it collected them on Wednesday.
The closeness and the nature of the deaths caused her to suspect the ducks might have been poisoned.
"They didn’t have any marks or anything on them."
Neighbours she had spoken to suspected it might have been slug pellets or rat poison.
"It’s absolutely awful. They’ve lived here for years."
Ms Andrew said she was quite happy to offer a reward, saying it was reasonable considering the death of eight birds.
"If we can find out what happened, it would be very useful.
"I love all animals; it’s horrible coming across these dead birds."
She worried the geese common to the area might be the next victims.
Hawksbury Lagoon is a 64ha wetland in the centre of Waikouaiti and provides a haven for a range of aquatic birdlife.
"If birds can’t safely live here, where can they live?"
