Assertion: hoatzin's claw | /r/HasProperty | distribution
Facets:
Source sentences:
text: In fact, digit I claws are generally present in ratites, gamebirds, waterfowl, divers, storks and kin, finfoots, owls, New World vutures, the Secretary bird Sagittarius serpentarius, waders and many others (Jefferies 1881, Fisher 1940) - a distribution which strongly suggests that they've been retained throughout neornithine history but lost selectively here and there, especially among so-called 'higher landbirds' [ostrich hand shown below; note obvious claws].