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Lewis and Clark were blown away by the thousands upon thousands of bison they saw storming across the open plain. It seems every time they turned around they spied a grizzly bear on a hillside. And the salmon were so thick in the rivers, they could have walked across the backs of them to get to the other side.

But... no more. Populations of bison, grizzly and salmon have greatly diminished, and some plant and animal species have gone extinct, or are on the brink of it.

Find out what Lewis and Clark observed about the following plants and animals -- and what's left today.

For more information, read the full Sierra Club special report:
What's Lost, What's Left: A Status Report on the Plants & Animals of the Lewis & Clark Expedition
(7MB pdf file)

Bison (Bos bison)	Black-footed ferret (Mustela nigripes)	Black-tailed prairie dog (Cynomys ludovicianus)
Gray wolf (Canis lupus)	Grizzly bear (Ursus arctos horribilus)	Interior least tern (Sterna antillarum athalassos)
Northern spotted owl (Strix occidentalis caurina)	Pacific salmon & steelhead (genus Oncorhynchus)	Western red cedar (genus Thuga)
Westslope cutthroat trout (Oncorhynchus clarki lewisi)	Whitebark pine (Pinus albicaulis)