They were playing on the sidewalk & heard a noise like a bull frog.

All puff up with wind lak a bull frog.

Now and then a fish leaped and splashed or a bull frog bellowed his hoarse "Better go home" into the silence.

That of the bull frog is lower, from 50 to 75; and in the leopard frog the range is from 80 to 125.

Project Gutenberg's Billy Bunny and Uncle Bull Frog, by David Magie Cory

The ducks are quacking, the bull frogs are croaking, and everything.

Professor Bull Frog discovered a strange tree, and called his comrades.

By night the bull frogs, inconceivably big and tremendously vocal, bellow under the banks.

End of the Project Gutenberg EBook of Billy Bunny and Uncle Bull Frog, by

Grandpa Bull Frog hopped over to chat with them.

Title: Billy Bunny and Uncle Bull Frog

Professor Bull Frog roared out:

These birds are very numerous in the reedy flats of the Murray, whence they call to one another like bull frogs.

Professor Bull Frog (nephew of the late explorer) said he believed the ridge was the wall that inclosed the earth.

"Grandpa Bull Frog plays a bass-viol," explained Nimble-toes.

Bull Frogs are sold for around £50 each while Rain Frogs fetch a much higher price and were likely to be sold as pets.