White-bellied Canary - Serinus Dorsotriatus
Male: face pattern only lightly defined; white lower belly and flanks diagnostic. Female: similar to male, but with greenish-olive face and streaks on sides of breast and flanks.
Song is a sweet series of Goldfinch-like notes or trils, interspersed with some harsher phrases, and quite loud.
Call is a shrill 'whee' or 'suweee'.