Things You'll Need
- Nest box
- Male finch
- Female finch
- Water mister
Instructions
Ask your vet to definitively sex your finches. Java finches are notoriously difficult to sex and it's vital that you have one male and one female in order to breed them. As a general rule, only the male finch sings, but a bird who does not sing is not necessarily a female.
Keep the finches separate until you are ready to breed them. This encourages mating behavior and makes the male more likely to build a nest when he is placed with the female.
Place a nest box in your finch's cage. Most pet and bird specialty stores carry finch nesting boxes. Add extra substrate to the cage as well. Cocks actively build nests before mating, so providing your male with hay, straw and other material with which to make a nest will stimulate mating behavior.
Put the two finches in the breeding cage together. Cocks begin building a nest before mating occurs, so if you see the cock working on a nest, mating will occur soon. The female should lay eggs between eight and 15 days after the pair is placed together with a nest box. If there are no eggs after three weeks, separate the birds for a week, and then reunite them to attempt mating again.
Wait for the hen to lay eggs. Hens normally lay one egg per day. Mist the eggs when the eggs begin to look dry. The female will incubate the eggs on her own, but will not begin sitting on them until she is finished laying. The eggs hatch 15 to 20 days after the female lays them.