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Dec 15, 2012 at 22:12 comment added James Waldby - jwpat7 As noted in a finstofeet.com article under heading What about the bird foot?, it is true that “the various bones of the lower tarsus and the metatarsus are fused into a single skeletal unit called the “Tarsometatarsus” [and] The tibia and the upper tarsal bones are fused to form the “Tibiotarsus””, but nevertheless, birds can crouch and they can sit (as on a nest) as well as stand
Dec 15, 2012 at 18:08 history answered Tim Lymington CC BY-SA 3.0