▁each ▁branch ▁of ▁the ▁fur cul a ▁( w ish bone ) ▁are ▁wide ▁and ▁rounded ▁in ▁bo hai orn ith ids , ▁as ▁opposed ▁to ▁the ▁tap ering ▁tips ▁in ▁other ▁en anti orn it he ans . ▁Their ▁sc ap ula e ▁( should er ▁bl ades ) ▁slightly ▁curve ▁down wards , ▁created ▁a ▁convex ▁top ▁edge ▁and ▁con ca ve ▁lower ▁edge . ▁Boh ai orn ith ids ▁also ▁had ▁gradually ▁tap ering ▁pyg ost yles . ▁A ▁bo hai orn ith id ' s ▁second ▁( inn erm ost ) ▁to es ▁were ▁th icker ▁than ▁their ▁other ▁to es , ▁while ▁their ▁third ▁( middle ) ▁to es ▁were ▁long ▁and ▁thin ▁and ▁all ▁of ▁their ▁toe ▁cla ws ▁were ▁very ▁long ▁and ▁cur ved . ▁ ▁Most ▁adult ▁bo hai orn ith ids ▁would ▁have ▁been ▁rather ▁similar ▁in ▁size ▁and ▁appearance ▁to ▁each ▁other , ▁and ▁the ▁family ▁lack ed ▁the ▁lon ge vity ▁and ▁physical ▁divers ity ▁of ▁some ▁other ▁en anti orn it he an ▁groups , ▁such ▁as ▁the ▁long - sn out ed ▁long ip ter yg ids . ▁The ▁only ▁spec im ens ▁of ▁bo hai orn ith ids ▁believed ▁to ▁have ▁reached ▁ad ul th ood ▁( the ▁hol ot ype ▁of ▁Z hou orn is ▁and ▁a ▁referred ▁spec imen ▁of ▁Boh ai orn is ) ▁were ▁also ▁the ▁largest ▁spec im ens , ▁and ▁were ▁about ▁the ▁size ▁of ▁a ▁p ige on , ▁which ▁is ▁much