Steller's sea eagle
Of the six species of birds and mammals that Steller discovered during the voyage, two are extinct (Steller's sea cow and the spectacled cormorant) and three are endangered or in severe decline (Steller's sea lion, Steller's eider and Steller's sea eagle). The sea cow, in particular, a massive northern relative of the dugong, lasted only 27 years after Steller discovered and named it. The sea cow had a limited population that quickly became victim of overhunting by the Russian crews that followed in Bering's wake.