Actually Hawaii has more endangered plants and animals per square mile than any other place on earth. It is sometimes referred to as the “Endangered Species Capital of the World.”

Some examples of endangered animals include 5 different species of turtles, the Hawaiian Monk Seal, Oahu Tree snails, 30 species of birds and around 279 plants.

There are an estimated 10-30 million species of insects worldwide (most still to be discovered and described by scientists). The following link will show you the estimated number of species going extinct while you view the webpage.
http://hbs.bishopmuseum.org/endangered/numbers/numbers.html

Source: Hawaii Biological Survey