What gets me is that initial pause. The bird knows this song. He knows when the drum comes in. Being able to anticipate musical rhythm is a form of intelligence very few species have, and this is the most remarkable example of it I’ve ever seen in a bird. The cockatoo knew to wait for the drums.
Penciling is a pattern of two to four black lines following the contour of the feathers on either a gold or silver (white) base. The dark brahma variety is silver penciled. In most breeds, gold penciled is called partridge. Adding blue or lavender dilution genes dilutes the black to a shade of grey. Dilution of gold in addition to the lavender gene results in a color commonly referred to as Isabel/Isabella
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