Frogs, toads, tadpoles, and powets are all named, though rarely in English heraldry. They have not been observed in French examples.
Or, a chevron between three frogs displayed gules--TREVONECK, Sancreed, Cornwall.
Ermine, a fesse between three toads sable--REPLEY.
Argent, three toads erect sable--BOTREAUX, Cockermouth, Cumberland.
Argent, a cheval gules between three tadpoles haurient sable--RUSSELL[quartered by RAMSAY].
Argent, a chevron gules between three powets haurient sable--RUSSELL[quartered by RAMSAY].