This undated handout photo made available on September 21, 2023 by the Dunedin Wildlife Hospital shows yellow-eyed penguin chicks being held by a vet at the hospital in Dunedin. A mystery illness is decimating the chicks of New Zealand's endangered yellow-eyed penguins, and scientists say they may have found the cause. (Photo by Handout/Dunedin Wildlife Hospital via AFP Photo)
