The Piney Woods is a temperate coniferous forest terrestrial ecoregion in the Southern United States covering 54,400 square miles (141,000 km2) of East Texas, southern Arkansas, western Louisiana, and southeastern Oklahoma. These coniferous forests are dominated by several species of pine as well as hardwoods including hickory and oak. Historically the most dense part of this forest region was the Big Thicket though the lumber industry dramatically reduced the forest concentration in this area and throughout the Piney Woods during the 19th and 20th centuries. The World Wide Fund for Nature considers the Piney Woods to be one of the critically endangered ecoregions of the United States. The United States Environmental Protection Agency (EPA) defines most of this ecoregion as the South Central Plains.
The North Yamaska river is a tributary of the Yamaska river. It flows over 47.8 kilometres (29.7 mi) on the south shore of the Saint Lawrence river in Quebec, Canada and passes through five municipalities, some of them sourcing their fresh water from it.
Pogonichthyinae is a subfamily of the freshwater fish family Leuciscidae, which contains the true minnows. Members of this family are known as American minnows or the North American (NA) clade of minnows. As the name suggests, all members of this family are found in North America (although they are not the only minnows native to North America, as Plagopterinae, Laviniinae, and Leuciscinae are also found there).