He speculated that it was probably unlikely that they could all have arisen spontaneously as separate species and thought that it was more probable that they had evolved from a mainland species of finch, possibly from Ecuador.

• 他觉得这些不同类的雀科鸟类不太可能是作为独立的物种同时形成的，它们很可能是来源于厄瓜多尔的同一个祖先。