None of them do, but the red bellied sapsucker will make a small hole in the bark of a tree to let sap drip out, then when a tasty bug gets stuck in the sap he will come and eat it.
Woodpeckers in general are diurnal. They rest at night on their holes. Acorn Woodpecker mostly eats acorns though they also eat fruits, sap, and insects.
A woodpecker eats insects and is therefore a carnivore.
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acorns
Sapsuckers (a species of woodpecker), lives inside of living hollows of trees and drinks the sap. Basically.
It is a type of woodpecker, but what's different about this "woodpecker" is that it eats sap found in trees. normal woodpeckers usually eat insects, but unfortunately, the yellow-bellied sapsucker is a bird who can kill trees by sucking all the life out of them. See related links for for more details
The Leadbeaters possum eats tree sap of wattle and eucalyptus trees.
it eats by pecking
Cicadas use their mouth parts to suck sap or juices from plants.
it depends on the breed
It eats insects by pecking at trees just like any other woodpecker would
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