Residue Habitat transforms urban lighting infrastructures into feather-enclosed nests, exploring how organic life emerges within the remnants of existing systems. Once designed for control and direction, these light sources are partially obscured, emitting only faint glows through narrow gaps, resembling traces of latent life. Feathers, as soft and accumulative materials, infiltrate and reshape rigid industrial shells, turning functional objects into sites of habitation. Here, “residue” is no longer waste but a generative surface—suggesting an ongoing reoccupation of space led by non-human forces.