The long thin head has a distinct canthus above the medium-sized eyes, which have round pupils and yellowish brown irises. When threatened or otherwise aroused, the western green mamba is capable of flattening its neck area into a slight hood.
The elongated head features a prominent orbital ridge above the medium-sized eyes, which have round pupils and yellowish-brown irises. When threatened or otherwise provoked, the western green mamba can flatten its neck region into a slight hood.