Abstract / Introduction / Summary:
![](https://journal.kagoshima-nature.org/archives/NK_047/images/047-044-2-300x187.jpg)
Female Mandarin duck dying with sword-tailed newt in the gizzard was found on Amami-oshima Is- land in January, 2017. Her death seemed to be due to the tetrodotoxin poisoning from the newt being eaten. Circumstantial evidences suggest that food shortage caused by a poor crop of acorn may relax criteria for risk assessment while in foraging.