svartkronebrillefugl Zosterops lugubris

A bulky, gray-olive white-eye with a dark crown, a pinkish-brown bill, a broad white eye-ring, and a white line from shoulders to flanks. Small to large groups join mixed flocks in forest and plantation throughout São Tomé, but it prefers highland forest above 900 meters. Its loud, rolling musical song is one of the dominant sounds on the island, but it also gives a demure chittering. Black-capped Speirops may join the same flocks as Sao Tome White-eye, which is slightly smaller and duller, without the distinctive dark cap.