What two surface features on the tongue aid in capturing insects once the bird probes a cavity?

Answer

Backward-pointing barbs and sticky saliva

The long tongue is coated in sticky saliva and equipped with barbs near the tip, allowing it to spear or adhere to grubs and ants efficiently.

What two surface features on the tongue aid in capturing insects once the bird probes a cavity?
birdanatomyphysical characteristicwoodpeckerbeak