The retired biologist says he never thought he would live long enough to see the once endangered species make such a strong recovery.
At least one other endangered monk seal has been killed by a dog in recent years. Several have been injured.
UPDATED: A new Hawaii "keystone" plan aims to help the islands' remaining forest bird species stave off extinction from avian malaria.
We can all do science, and many organizations rely on the public for major projects.
People have killed at least 16 seals since 2009. Only one case been prosecuted.
UPDATED: The discovery comes after officials disclosed another young seal was most likely killed intentionally on the island in March.
The seal had been rescued as a pup, cared for, and released in January. Its body was found in March with blunt-force trauma.
The world's first attempt at landscape-scale mosquito control for conservation holds promising health benefits for people too.