An example of ambidentate ligand is

Ambidentate ligands are those unidentate ligands which contain more than one coordinating atoms. Thiocyanate is an example of such a ligand.

$\begin{array}{lc} \mathrm{M}\leftarrow \mathrm{SCN}& \mathrm{M}\leftarrow \mathrm{NCS}\\ \text{ Thiocyanato }& \text{ Isothiocyanato }\end{array}$