▁would ▁likely ▁have ▁limited ▁the ▁flex ibility ▁to ▁a ▁considerable ▁degree . ▁The ▁authors ▁ca ution ed ▁against ▁estim ating ▁range ▁of ▁motion ▁from ▁just ▁using ▁the ▁b ones ▁alone . ▁This ▁discovery ▁also ▁reve als ▁that ▁sau rop ods ▁may ▁have ▁had ▁to ▁move ▁their ▁whole ▁bodies ▁around ▁to ▁better ▁access ▁areas ▁where ▁they ▁could ▁gra ze ▁and ▁brow se ▁on ▁veget ation . ▁ ▁Track ways ▁and ▁lo com otion ▁ ▁Sau rop od ▁track ways ▁and ▁other ▁foss il ▁foot print s ▁( known ▁as ▁" ich n ites ") ▁are ▁known ▁from ▁abund ant ▁evidence ▁present ▁on ▁most ▁contin ents . ▁I chn ites ▁have ▁helped ▁support ▁other ▁bi ological ▁hypoth eses ▁about ▁sau rop ods , ▁including ▁general ▁fore ▁and ▁h ind ▁foot ▁an atom y ▁( see ▁Lim bs ▁and ▁feet ▁above ). ▁Gener ally , ▁prints ▁from ▁the ▁for efe et ▁are ▁much ▁smaller ▁than ▁the ▁h ind ▁feet , ▁and ▁often ▁cres cent - sh aped . ▁Occ asion ally ▁ich n ites ▁preserve ▁traces ▁of ▁the ▁cla ws , ▁and ▁help ▁confirm ▁which ▁sau rop od ▁groups ▁lost ▁cla ws ▁or ▁even ▁digits ▁on ▁their ▁for efe et . ▁ ▁Sau rop od ▁tracks ▁from ▁the ▁Vill ar ▁del ▁Ar z ob is po ▁Form ation ▁of ▁early ▁Ber rias ian ▁age ▁in ▁Spain ▁support ▁the ▁gre g ari ous ▁behaviour ▁of ▁the ▁group . ▁The ▁tracks ▁are ▁possibly ▁more ▁similar ▁to ▁Sau rop od ich n us ▁gig ante us ▁than ▁any ▁other