Assertion: hoatzin's claw | /r/HasProperty | lost
Facets:
Source sentences:
text: Young have two claws on their hand digits which they use to grasp branches and climb around vegetation (claws are lost before maturity but adults also use their wings for support in vegetation).
text: The crest resembles a mohawk, while the claws, which are lost as the bird matures, are a mechanism for the youngsters to escape danger through climbing.
text: The claws are lost as the birds mature, by which time they can muddle through well enough in the air.
text: These claws enable the young bird to climb up trees, and are lost when the bird is able to fly.
text: The claws are lost when the hoatzin matures.