Zebra Finch.?

Brief：
How can you tell the difference between a male and female zebra finch?Answers: Luckily, Zebra finches are dimorphic, so they can reliably be visually .. 

How can you tell the difference between a male and female zebra finch?

Luckily, Zebra finches are dimorphic, so they can reliably be visually sexed. Male features include orange cheeks, throat stripes, a black breast bar and a chestnut-colored flank with white spots. Females are gray in those areas. The male beak is usually bright red and it's orangeish in females, but in and out of breeding condition, beak shade varies. Juveniles look like females, but with a black beak, until 90 days old.

Color mutation changes the visible sex characteristics, so I found you a list of color mutations to find yours in: http://www.zebrafinch.com/newzebra/zebra. Mutation Effects

Inheritance: Dominant

Male: The Dominant Silver causes a dilution of all markings the markings, both orange and black as well as the base color. The amount of dilution varies. Cheek patches can vary from nearly white to almost full orange.

Female: Like the male, the base color and all markings are diluted. The amount varies.

Fledgling: Dominant Silver chicks can be identified as soon as they feather out in the nest. They will have diluted feathers. They also have horn-colored beaks.

Combinations

The Dominant Silver (DS) mutation is most often combined with the Fawn mutation to create dilute fawns or Dominant Creams. The cream colored birds are very attractive, but some of the males can have such diluted markings that it can be difficult to distinguish them from the females. Another popular combination is Dominant Silver and Lightback. The result is a dilute bird with black tear marks, breast bar and tail bars. This is best seen on those birds with white cheeks. It is quite popular in Australia to combine DS with Black Face to create a bird with stunning contrasts. The photos I have seen show a dark black extension of the breast bar rather than a dilute gray. This is surely due to selective breeding for darker markings. In the US the best path for such a bird might be to combine DS with Lightback and Black Face. This triple combination should provide the desired contrast and color. It could also be achieved more quickly than other triple combinations since two of the mutations are Dominant and one is sex-linked. The male legs are closer together.