When sexing by beak it is important to note that mature male Javas have a swollen area at the base of the beak and hens do not. There are other ways to sex Javas such as beak sexing (please refer to photos below), eyering sexing, pelvis sexing and DNA sexing. You can write this down in your records, catch the birds up later and band all the hens one color and the males another. To solve this you can put a different color plastic band on all your Javas and when you hear one singing notice it’s band color. The problem with spotting them in the flight is catching the same bird that was singing!! If you have a flight full of Javas it will be easier to pick out males because they sing a lot more in a flight or you can try introducing a new Java into the flight to intice the males. If the bird in question is a male it will start to sing after about a week of solitude. In order to hear the bird sing you can separate them from all other birds. ONLY the male Java Finch sings!! Young male birds will attempt to sing at about 1-2 months after they fledge. They can be very difficult to sex especially with young birds! There are four ways to distinguish the gender of Java Finches but only one has 100% accuracy so let’s start there. Sexing a Java Finch is the hardest part of owning one. These birds average 5-6 inches (13-15cm) and are very hardy birds. Both sexes look identical with only slight differences in beak shape and color. Javas have red-pink beaks, legs and eye circles. The belly is a cinnamon brown color and the under tail coverts are white. A blue-gray covers the bird’s mantle, back, secondary wings, chest and rump. The primary flight wings feathers and upper tail converts are also black. ![]() In the normal form the head, nape and chin are black with white cheek patches outlined in black. The below photos and information is courtesy of Mandy and Paul – Breeder of Canaries and Other Exotic Birds – Singing Wings Aviary – (A great source for these beautiful little finches) Description: The call is a chip, and the song is a rapid series of call notes chipchipchipchipchipchip. The nest is constructed in a tree or building, and each clutch contains up to eight eggs. It frequents open grassland and cultivations, and was formerly a pest in rice fields, hence its scientific name. This small finch is native to Java, Bali and Bawean. The Java Finch, Padda oryzivora also known as Java Sparrow is a popular cagebird, and has been introduced in a large number of other countries.
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