Alder Tit - Agate

Description:

As with the canary, this mutation is sex-linked and recessive.

Male: In this mutation, there is a complete absence of brown in the plumage. The back is greenish-grey with black streaks. In some individuals, the throat patch is grey-black. The breast is greenish-yellow. The flanks are the same colour, streaked with grey. The flight feathers and tail feathers are dark grey with a pale yellow wing bar.

Female: In the female, the back is greyish with dark grey streaks. The breast is greyish-white streaked with blackish-grey. The flanks are also off-white streaked with dark grey. The wings and tail are practically the same as in the male, but with paler yellow highlights.