How Hits Were Made on Instagram: "Birds of a Feather is the fourth track on Billie Eilish’s third studio album Hit Me Hard and Soft, written by Billie Eilish and Finneas O’Connell and produced by Finneas at his Los Angeles home studio. The album arrived on May 17, 2024. The song gained early attention when Netflix’s Heartstopper used a preview in its Season 3 teaser on May 13, 2024, which primed fans before the label Darkroom and Interscope sent it to radio as the album’s second single on July 2