WordNet (r) 3.0 (2006):

spring frog
    n 1: similar to bullfrog; found in or near marshes and ponds; of
         United States and Canada [syn: green frog, spring frog,
         Rana clamitans]
    2: common North American green or brownish frog having white-
       edged dark oval spots [syn: leopard frog, spring frog,
       Rana pipiens]