Book excerpt: During the late 1800s and early 1900s, it was common practice for milliners to decorate women's hats with birds' feathers and plumes--and sometimes with the birds themselves. As many as 300 million birds per year were killed for this fashionable enterprise, causing the extinction of some entire species and the endangerment of others. Lawmakers and bird aficionados were slow to react to the effects of this practice, which went on almost unabated for a quarter of a century. Then, noted naturalists like George Bird Grinnell, William T. Hornaday, and President Theodore Roosevelt, who recognized the economic benefits birds provided, banded together to pass meaningful legislation to protect them and to curb the production of murderous millinery. This book explores the troubled history of millinery and its complicated relationship to birds and conservation. It explores why it took so long for the slaughter to end and how the efforts of individuals and groups brought about change.