The São Tomé fiscal or Newton's fiscal (Lanius newtoni) is a species of bird in the Laniidae family. It is endemic to São Tomé and Príncipe. It is 20 to 21 centimeters long. The bird is black above with a white shoulder-scapular bar.[1] The São Tomé fiscal has a yellow chin, breast, belly, flanks vent and under tail.[2] Its graduated tail has all black central tail feathers and an increasing amount of white on outer web from inner to outer tail feathers.[3] The Lanius newtoni has a clear voice with a whistle tiuh tiuh often repeated and metallic tsink tsink audible over a long distance.[1]