Normal grey (wild-type)
A variant of Cockatiel (Nymphicus hollandicus)
Representative Cockatielphoto — a dedicated image of this exact morph isn't available yet.
The ancestral form: grey body, white wing bars, a yellow face and crest, and round orange cheek patches (brighter and full-faced in males).
Keeper tips for this variant
The most robust cockatiel genetically; provide a calcium/cuttlebone source and avoid scaring them at night, as cockatiels are prone to panicked 'night frights' in the dark.