Liberal "logic" at its finest. We haven't identified 'most' yet we know 50K of 'em are going extinct. Riiiiiggghhttt...
Just like we know there are 12 to 15 million of 'undocumented' aliens in the country. We have no tracking of them yet we know how many they are.
Riiiiighhhttt......
We don't know and the libs don't know. It just makes good copy for the anti-human, enviro-religious types. Humans make up the only species that constantly regret their own actions and their very existance.