The Popobawa (Swahili for 'bat wing' — from popo, 'bat,' and bawa, 'wing') is a distinctive Zanzibari shadow-entity whose origin tradition dates from the 1960s but which became a pan-island phenomenon during the 1995 Zanzibar panic. According to traditional accounts, the Popobawa was created by an Arab spirit-caster on the neighbouring island of Pemba in the 1960s and escaped its sender's control. The creature is described as approximately one metre tall, with elongated bat-like wings, a single cyclopean eye, and extremely sharp fingernails. It visits sleeping villagers — often preferentially targeting adult men — assaulting them while they are paralyzed in bed, then threatening them that they must tell others of the encounter or face a second and more severe visit.
The 1995 Zanzibar panic, first reported in February and reaching its peak in March of that year, produced approximately 500 formal reports to Zanzibar police over three months and dozens of hospitalizations. Victims described waking in paralysis, seeing a shadow figure on the ceiling or at the foot of the bed, feeling pressure or actual physical assault, and subsequent visible bruising, scratches, and pressure marks. Crowds gathered in neighborhoods at night for collective protection; at least one Zanzibari man was killed by neighbours who suspected him of being the Popobawa. The Tanzanian Ministry of Health dispatched medical teams to Zanzibar. Medical examination of dozens of victims confirmed genuine physical injuries — scratches, bruising, and in some cases superficial puncture wounds — without identifiable conventional causes.
The Popobawa phenomenon has been studied extensively by sleep-paralysis researchers including Harvard's Kirsten Gesine-Nelson and Dar es Salaam University's ethnographers. A strong correlation exists between episodes and Zanzibari electoral periods; the 1995 panic occurred during the lead-up to Tanzania's first multi-party elections. Subsequent smaller flaps occurred in 2000 and 2007, also during political-transition periods. The Popobawa is a rare case of a thoroughly-documented shadow-entity tradition that transitions between clinical sleep paralysis, cultural panic, and apparent genuine physical injury. It remains a significant subject of African paranormal research and is formally catalogued in the Tanzanian Ministry of Health's public-health records.