▁of ▁the ▁family ▁Ran idae , ▁ ▁found ▁throughout ▁much ▁of ▁Europe ▁as ▁far ▁north ▁as ▁Sc and in avia ▁and ▁as ▁far ▁east ▁as ▁the ▁Ur als , ▁except ▁for ▁most ▁of ▁I ber ia , ▁southern ▁Italy , ▁and ▁the ▁southern ▁B alk ans . ▁The ▁far th est ▁west ▁it ▁can ▁be ▁found ▁is ▁Ireland . ▁It ▁is ▁also ▁found ▁in ▁Asia , ▁and ▁east ward ▁to ▁Japan . ▁ ▁Common ▁fro gs ▁met am orph ose ▁through ▁three ▁distinct ▁development al ▁life ▁stages   — ▁aqu atic ▁lar va , ▁terrest rial ▁ju ven ile , ▁and ▁adult . ▁They ▁have ▁cor p ul ent ▁bodies ▁with ▁a ▁rounded ▁sn out , ▁we bb ed ▁feet ▁and ▁long ▁h ind ▁legs ▁adapted ▁for ▁sw imming ▁in ▁water ▁and ▁ho pping ▁on ▁land . ▁Common ▁fro gs ▁are ▁often ▁confused ▁with ▁the ▁common ▁to ad ▁B uf o ▁buf o , ▁but ▁fro gs ▁can ▁easily ▁be ▁distinguished ▁as ▁they ▁have ▁longer ▁legs , ▁hop , ▁and ▁have ▁a ▁mo ist ▁skin , ▁whereas ▁to ads ▁craw l ▁and ▁have ▁a ▁dry ▁' wart y ' ▁skin . ▁The ▁spawn ▁of ▁the ▁two ▁species ▁also ▁diff ers ▁in ▁that ▁f rog sp awn ▁is ▁laid ▁in ▁cl umps ▁and ▁to ad sp awn ▁is ▁laid ▁in ▁long ▁strings . ▁ ▁Description ▁The ▁adult ▁common ▁f rog ▁has ▁a ▁body ▁length ▁of ▁ ▁its ▁back ▁and ▁fl anks ▁varying ▁in ▁colour ▁from ▁o live ▁green ▁to ▁grey - b rown ,