Tsundere is a pretty common term used in the anime community but there are still many who don't know what is actually means. Tsundere is actually a term derived by fans to classify a type of anime character that is becoming more common, usually a female lead.
Throughout the Corps more than 4,000-mile journey, Captains Lewis and Clark recorded 178 plants and 122 animals not previously known to science. Lewis recorded and pressed and preserved some 240 different plant species and brought them back to Washington, along with hundreds of animal and bird skins and skeletons.
It was a marker, I think, that they saw on the Great Plains, of the wildlife that they saw. If you go on the Great Plains today, the things that Lewis and Clark remarked the most on, are absent. Ten thousand head of buffalo in one glance, elk living on the Plains. Grizzly bears were a Plains animal. It was, it was bountiful in wildlife as today it is a desert of wildlife, it is a bountiful today of growing food and of cattle, but it is a desert of wildlife of what Lewis and Clark once saw.