Assertion: woodpecker's tail feather | /r/ObjectUse | used as prop
Facets:
value: as with other woodpeckers
type: OTHER
value: against the trunk
type: TRANSITIVE-OBJECT
Source sentences:
text: These include the zygodactyl arrangement of the foot, with two toes facing forward and two back, and the stiff tail feathers that are used as a prop against the trunk.
text: As with other woodpeckers, the stiff tail feathers are used as a prop when it is clinging to a tree, and its toes are specially arranged with two pointing forwards and two backwards.