Kambu-ardhi ni ndege wa familia Brachypteraciidae wanaotokea Madagaska tu. Wanafanana na viogajivu wadogo lakini hawana rangi kali, isipokuwa kichwa cha kambu-ardhi kichwa-buluu na kile cha kambu-ardhi kichwa-chekundu. Hutafuta chakula chini na hula wadudu na watambaachi. Tago lao ni kishimo ardhini. Jike huyataga mayai 1-4. Atelornis crossleyi, Kambu-ardhi Kichwa-chekundu (Rufous-headed Ground Roller) Atelornis pittoides, Kambu-ardhi Kichwa-buluu (Pitta-like Ground Roller) Brachypteracias leptosomus, Kambu-ardhi Miraba (Short-legged Ground Roller) Geobiastes squamiger, Kambu-ardhi Madoadoa (Scaled Ground Roller) Uratelornis chimaera, Kambu-ardhi Mkia-mrefu (Long-tailed Ground Roller) Kambu-ardhi miraba Kambu-ardhi mkia-mrefu