Nominate (Green)
A variant of Lineolated Parakeet (Bolborhynchus lineola)

Representative Lineolated Parakeetphoto — a dedicated image of this exact morph isn't available yet.
The wild-type form: bright grass-green with the characteristic black barring/lineolation across the wings and flanks. This is the baseline against which all mutations are judged.
Keeper tips for this variant
A naturally calm, quiet 'linnie' that does well in modest aviaries; offer horizontal bars and flat perches since they walk more than they climb.