Only a few parrot species are sexually dimorphic. No, that doesn’t mean they are amorously kinky it just means males and females look very different from one another. For example, my Amazon, Bobo, is not from a sexually dimorphic species and males and females look alike. After 17 years of identifying as a male, (she says “Bobo’s a baaaaad boy!”) an illness required a DNA test to determine Bobo’s true sex so she could be treated (not her current problem). They determined she was a female which was only detectable if she laid an egg or had a DNA test.
A striking example of a sexually dimorphic parrot species is the Australian King Parrot. Males have a brilliant red head and body with wings bright green and a blue rump. Click here to see an example of a male King Parrot. This is the female, brilliant green head and neck mottled green with some red, the queen of the King Parrot so to speak. The primary difference is in the head and neck but it makes them look like different species. This female appears coy as she watches the King Parrot males fluttering out of view vying for treats.