Altogether at least a score of pigeons might be chosen, which, if shown to an ornithologist, and he were told that they were wild birds, would certainly be ranked by him as well-defined species.
Guztira, hogei bat uso, gutxienez, aukera litezke, ornitologo bati aurkeztu eta basa-txoriak direla esanez gero, ongi zehazturiko espezietzat sailkatuko lituzkeenak.