The red-billed firefinch or Senegal firefinch (Lagonosticta senegala) is a small seed-eating bird in the family Estrildidae. This is a resident breeding bird in most of Sub-Saharan Africa with an estimated global extent of occurrence of 10,000,000 km2. It was introduced to Egypt, but the population there has become extinct. It was also introduced to southern Algeria where it is currently expanding northward.
In 1760 the French zoologist Mathurin Jacques Brisson included a description of the red-billed firefinch in his Ornithologie based on a specimen collected in Senegal. He used the French name Le Sénégali rouge and the Latin name Senegalus Ruber. Although Brisson coined Latin names, these do not conform to the binomial system and are not recognised by the International Commission on Zoological Nomenclature. When in 1766 the Swedish naturalist Carl Linnaeus updated his Systema Naturae for the twelfth edition, he added 240 species that had been previously described by Brisson. One of these was the red-billed firefinch. Linnaeus included a brief description, coined the binomial name Fringilla senegala and cited Brisson's work. The species is now placed in the genus Lagonosticta...