Assertion: spadefoot's side | /r/ObjectUse | used for burrowing
Facets:
Source sentences:
text: Characteristic features include eyes with a vertical pupil and a sharp-edged dark ridge (“spade”) on the inner side of each hind foot, used for burrowing.
text: Characteristic features include eyes with a vertical pupil and a sharp-edged, sickle-shaped, dark, keratinized ridge (“spade”) on the inner side of each hind foot, used for burrowing.