All frogs breathe through their mouth (The throat of a frog 'pulsates' up and down which is causing air to be drawn in through, and pushed out from, its nostrils.)
They also have the ability to breathe through their skin (Which allows them to breathe when hibernating in the bottom of ponds etc) This, and the ability to absorb moisture through their skin, is contributing to their decline across the globe as it means they are very susceptible to chemical and gaseous pollution.
They also have the ability to breathe through their skin (Which allows them to breathe when hibernating in the bottom of ponds etc) This, and the ability to absorb moisture through their skin, is contributing to their decline across the globe as it means they are very susceptible to chemical and gaseous pollution.