Anatomy of the eye. The sclera is the white part of the eye, its protective outer layer. The optic nerve is attached to the sclera at the back of the eye. With age, the sclera becomes more yellow in colour.
depends on the quality-it can range from $8 to $20 depending on what its made of-chiffon, silk, spandex. etc. polyester chiffon is about $11 per metre at spotlight.
Since there are so many varieties, the price can be all over the place. For instance, a Normal Grey Cockatiel can retail for $60 to $80, while a Cinnamon Cockatiel can range from $75 to $95. Higher-end Albino Cockatiels, for example, can cost as much as $140. On BirdsNow.com, an online bird classified website, has more than 500 listings at the time of this writing. Most of the prices, from what we researched, were anywhere from $70 to $350+ These birds can often be found at a big box pet stores such as Petsmart and Petco.