because they live inside it.
Woodpeckers tap on tree trunks. They are looking for insects to eat when they do this. Woodpeckers have a red head.
cicadas
Tree trunks is that trees middle position.
tree trunks have xylem and phloem
They eat Insects, worms, spiders, frogs, lizards, and small birds. They live in tree holes, tree trunks,farms,bushes,forests,and in barns.
Trunks
creepers are called this because they literally creep up and down the tree trunks looking for little insects hiding in the crevices.
Lichen is a combination of fungus and algae. It grows on tree trunks.
Algae or mosses live on tree trunks.
Cicada insects, they are big ugly flying bugs that like to cling to tree trunks.
Tree trunks are straight and branchless in their lower parts in their efforts to grow tall.
None.