Fiscal shrikes are known for being bold little hunters. Even though they are not very big - about the size of a large sparrow - they have strong, hooked beaks that help them catch insects, lizards and other small creatures. The São Tomé species developed its own special features after living on the island for thousands of years, cut off from its relatives on the African mainland.
The bird is called 'fiscal' because its crisp black-and-white colouring reminded early naturalists of the uniform worn by government officials in southern Africa. On São Tomé it is even more distinctive - the island birds have slightly different markings from their mainland cousins.
What makes the São Tomé fiscal shrike especially precious is how rare it has become. Much of its forest habitat has shrunk over the years, and it is now classified as a vulnerable species by wildlife scientists. Conservationists work to protect the remaining forest areas where the bird nests and feeds.
Birdwatchers from many countries visit São Tomé hoping to spot this shrike. Finding one is considered a real achievement, and sightings are carefully recorded to help track how the population is doing. Local guides who know the forest well are very helpful in spotting this elusive bird.