because its sticky
Their sticky tongue helps it catch the food by quickly flicking out and bringing it's prey into it's mouth to swallow.
Frogs have a long sticky tongue that they can flick out to an appreciable distance. They can even catch the elusive fly with it.
Tongueless frogs catch their prey by using their sticky fingers to grab insects or other small organisms. They rely on their quick reflexes and agility to capture their food without the use of a tongue.
it catch its prey using the tongue
A frog's tongue is attached to the front of its mouth by a sticky and muscular base called the hyoid bone. This bone allows the frog to project its tongue rapidly to catch prey. The tongue itself is covered in mucus to help trap insects when it flicks out.
it has a sticky long tongue.
They sick their long tongue out and gobble down their prey
to catch prey
With their sticky toungue.
Frogs and toads use their tongue to catch insects, but some species prefer to hide and wait for an unsuspecting prey and then pounce.
by eating it
Frogs are carnivores and, not only do they catch and eat insects, but they even catch tiny mammals such as bats, so they need teeth to help them grip larger prey. Frogs do not use their teeth for chewing, but for gripping the food. Therefore they have teeth only in their upper jaw.