| Costa Rican brush finch, Black‑capped sparrow, Vilcabamba brush finch, Olive finch, Half‑collared sparrow|São Francisco sparrow Wikipedia
The São Francisco sparrow (Arremon franciscanus) is a species of bird in the Emberizidae family that is endemic to Brazil. The species were described in 1997 by Marcos Raposo in his book Ararajuba. The species feeds on caatinga and can be found in the valley of Rio São Francisco and in the states such as Bahia and Minas Gerais. Unlike its cousins the pectoral and half-collared sparrows, the São Francisco sparrow has a full breast band, which later reduces itself to two breast patches closer to the wing bend. The species also has other distinguishing features, orange bills and black culmens. They are threatened due to habitat loss.