With respect to the absence of whole orders of animals on oceanic islands, Bory St. Vincent long ago remarked that Batrachians (frogs, toads, newts) are never found on any of the many islands with which the great oceans are studded.
Irla ozeanikoetan animali ordena osoak falta izateari buruz, duela asko ohartarazi zuen Bory St. Vincent-ek inoiz ere ez dela aurkitzen batrakiorik-igelak, apoak, uhandreak-ozeano handiak zipristintzen dituzten irla ugarietariko batean ere.