Plume hunting is the hunting of wild birds to harvest their feathers, especially the more decorative plumes which were sold for use as ornamentation, particularly in hat-making (millinery). The movement against the plume trade in the United Kingdom was led by Etta Lemon, Eliza Phillips, Emily Williamson, and other women and led to the establishment of the Royal Society for the Protection of Birds. The feather trade was at its height in the late 19th and was brought to an end in the early 20th century.

Feathers are epidermal growths that form a distinctive outer covering, or plumage, on both avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates and a premier example of a complex evolutionary novelty. They are among the characteristics that distinguish the extant birds from other living groups.