Black-cheek
A variant of Zebra finch (Taeniopygia guttata)
Representative Zebra finchphoto — a dedicated image of this exact morph isn't available yet.
A recessive mutation expanding melanin so the cheek patch and markings turn black, giving a dramatic high-contrast cock bird.
Keeper tips for this variant
Black-cheek lines are notoriously delicate and can be poor parents; consider fostering eggs under reliable grey/fawn pairs and keep the gene on hardy outcross stock.