Common frog

Observation - Common frog - UK and Ireland. Description: Today i was lucky enough to find a frog just outside my house in Bristol, as i watched it it squeaked rather than the familiar croak. The squeak was louder than a mouse's and was very high pitched. Is this the real sound that frogs make or is it an immatu

Today i was lucky enough to find a frog just outside my house in Bristol, as i watched it it squeaked rather than the familiar croak. The squeak was louder than a mouse's and was very high pitched. Is this the real sound that frogs make or is it an immature frog which hasn't learnt to croak.