Assertion: petrel's tail | /r/HasProperty | medium
Facets:
Source sentences:
text: The wings are shorter than those of most other procellariiforms and are rounded at the tips; the bill is of medium length; the nostril tubes (common to all members of the order) are united on the upper surface of the bill; the toes are webbed, except for the hind toe, which is small and elevated; the tail is medium to long and square, forked, or wedge shaped.