All summer long, the little frog squats, motionless, on the bank of a quiet pond or brook and watches for passing insects.
If a fly or cricket passes within reach, the frog’s long tongue will snap out like a flickering ship, so fast that you can scarcely follow the action. The insect is caught on the sticky tip. Just as quick as the frog flips its tongue back into its mouth.
The frog’s tongue is fastened at the front of its mouth, not the back, so that it can be flipped out a long way. The frog’s mouth is equipped with feeble, practically useless teeth, which are present only in the upper jaw. So it must live mostly on small creatures that it can swallow in one gulp.
Frogs also eat earthworms, spiders and winnows that they catch in the water. Toads capture their food in much the same way as frogs do.
Frogs and toads help man by sailing many harmful insects to be found in gardens and on farms. – Dick Rogers