He also mentioned that it was known as the "secretarius" by farmers who had domesticated the bird to combat pests around their homesteads, and proposed that the word "secretarius" might be a corruption of "sagittarius".[5][6] Ian Glenn of the University of the Free State suggests that Vosmaer's "sagittarius" is a misheard or mis-transcribed form of "secretarius", rather than the other way around.