How do you tell blue-headed pionus male from female?

In blue-headed pionus parrots, males and females can be challenging to distinguish visually, as both sexes have similar plumage. However, males typically have a slightly larger and more vibrant blue head, while females may exhibit a duller coloration. Additionally, males may have a more pronounced red under their tail feathers. A definitive way to determine the sex is through DNA testing, which can provide accurate results.