Bahia wagtail-tyrant
The Bahia wagtail-tyrant (Stigmatura bahiae) is a South American species of bird in the family Tyrannidae. The Bahia wagtail-tyrant is found in southeast Brazil. It is typically found in dense, brushy, and low stature caatinga below about 600 meters. References

Stigmatura
Birds of Brazil
Birds described in 1926