plural of northern red oak

bloody dock, Rumex sanguineus

An evolutionary hypothesis which proposes that organisms must constantly adapt, evolve, and proliferate not merely to gain reproductive advantage, but also simply to survive while pitted against other evolving organisms in an ever-changing environment.

Podiceps grisegena a migratory aquatic bird found in the temperate regions of the northern hemisphere.

A canyon system on the Red River in east-central Kentucky.

A gull native to New Zealand, its surrounding islands and subantarctic islands; the Chroicocephalus scopulinus.

plural of red-backed shrike

Synonym of watermelon radish

plural of red meat radish

Lobelia cardinalis, native from Quebec to California and at higher elevations through Central America to Colombia.