This is a non-diffusing subcategory of Category:Outlines. It includes Outlines that can also be found in the parent category, or in diffusing subcategories of the parent.

This is a diffusing subcategory of Category:Outlines of natural sciences. Articles about Outlines of biology in the parent category should be moved to this subcategory.

Each entry below is an outline, an introduction to a subject structured as a hierarchical list of the essential points. Each of these outlines focuses on a biology topic, plant, or animal. Along with Wikipedia:Contents/Outlines, the outlines on Wikipedia form an all-encompassing outline of the knowledge of humankind. Pages included here should also be included in Category:Outlines.