20% – 25% of parrots are sexually dimorphic meaning you can identify their sex by the color of the bird. Male eclectus are green – females are red.
Male Indian ringnecks have the ring females do not. The ring starts to grow in one feather at a time beginning at about 10 months and completing in 1-1/2 years.
Adult budgie hens have a cere right above their beaks that varies from whitish blue to deep brown in color. The most common is that a male budgie has a bright blue cere. It may brighten during breeding season, and then fade. A females cere ranges from white to brown and pink.