Assertion: ibis's bill | /r/HasProperty | sibley
Facets:
Source sentences:
text: Distinguishing characteristics which separate the two species include the red iris versus a more brownish or dark iris, bright red legs versus more grayish ones, the bare facial skin colored red and trim of white feathers which surround the eye versus a darker face with only small white lines connecting the bill to the eye (Ryder and Manry 1994), and the olive-gray bill versus a more brown colored bill (Sibley 2000).