This encounter gave rise to thoughts about the various colors of avian eyes. The color portion of the eye is called the iris. Eye colors range from deep brown to metallic gold and silver, with a rainbow of colors including bright red, yellow, blue and green found within the spectrum. In several species, the color of the iris changes as the bird matures. Eye color also differs between the sexes in some.
This post features several photographs of birds which I find to have particularly interesting or beautiful eyes.
Adult Yellow-crowned Night Herons have deep orange to ruby red eyes
Juvenile Yellow-crowned Night Heron
The stunning brilliant red eye of a male Wood Duck
The bright yellow eyes of a Green Heron stand out against the iridescent blue green facial feathers
Great Blue Herons have yellow eyes with distinctive black pupils
~ Great Blue Heron ~
Notice the filmy look of the herons eye in this image and compare it to the previous photograph of the same heron. This translucent tissue or "third eyelid" is called the nictitating membrane. It is used to protect, moisten and clean the eye.
The beautiful pastel blue eyes of a White Ibis
Adult Ospreys have piercing yellow eyes
This Horned Grebe sports interesting scarlet red eyes and lovely breeding plumage
Juvenile Black-crowned Night Herons have rich yellow or amber eyes
The marble-like turquoise eyes of a Double-crested Cormorant
The warm golden eyes of male Hooded Mergansers are quite captivating
Vibrant red eyes enhance the beauty of this colorful male Cinnamon Teal
The magnetic yellow eyes of a Snowy Owl