There’s a high-pitched sound that once echoed across an Australian tropical island that will never be heard again. As the Christmas Island shrew (Crocidura trichura) began to decline in numbers, first ...

Now the tiny creature has been declared extinct by the International Union for Conservation of Nature (IUCN), which manages the authoritative Red List of threatened species. The shrew had not been ...

If you’re not a biologist, the Mount Lyell shrew looks similar to other shrews that occupy the Sierra Nevada. It’s a small, grayish brown mammal with a pointy nose. Aside from its size, it’s not ...