Did You Know That a white fronted amazon not only is the smallest of the amazon species, But is the only one of the amazon species in which the adult male and female easily can be distinguished by external appearance.
Males have bright red feathers on their shoulders while females have green shoulders.
The juveniles have pale grey irises and less red on their face and the white area is replaced with smaller yellowish area.
While it is true that the White Fronted is sexually dimorphic, it is not the only amazon that is.
The Yellow Lored is markedly dimorphic, the female has no red or white on the head and no red on the wings and her dark ear coverts are less pronounced.
In the Red Spectacled or Pretre's Amazon, the female has much less red on her head as well as less extensive scarlet on the carpal edge of the wing and underwing coverts.
The Tucuman Amazon male has most of the primary wing coverts red while the female will only have between 2-5 coverts red.
The Green Cheeked Amazon female has green lores as opposed to red in the male, and the red on the crown does not extend as far back as the male's which reaches well past the eyes.
Salvin's females have less pink on the throat and less pronounced mauve on the edges of the head feathers.
The Diademed Amazon is similar in that the female's head is less brightly colored than the male.
The Scaly Naped male has red on the wing speculum which is lacking in females.
The Red Browed Amazon female has more yellow in the lores and the yellow extends down into the cheeks as opposed to the males where it is concentrated in the lores
While more subtle than the dimorphism of the Eclectus group, a significant number of species in the genus do display gender traits. All of these differences are published and referenced by Rosemary Low in "Amazon Parrots, Aviculture, Trade, and Conservation" Dona 2005.
That said, an experienced breeder can identify with good accuracy by looking at the shape of the head, the eyes, or a pelvic exam.
