Breeding Season for finches in South Africa span most of the summer (September through February). In fact Zebra Finches and Bengalese finches are prolific breeders and need to be monitored to avoid exhaustion. Young finches tend to keep on laying eggs (up to seven or eight) and may never start the incubation process. Use a small LED torch or in the case below sunlight to identify viable eggs.
They are also prone to abandoning the nest or hatch-lings. As a rule I try to identify the breeding pair and remove all eggs for finches younger than 18 months. For older pairs I remove any excess eggs, sticking to four to five eggs to a clutch.
Bengalese Finches – much like Zebra finches, Bengalese will breed whenever the chance permits. It is always a good idea to have Bengalese finches in the aviary, as they will act as natural foster parents for abandoned nests.
Grass Finches – tends to breed towards the end of summer once the heat has dissipated. In some instance the 3 – 4 pairs have started breeding well into March.
Zebra Finches – Almost the whole spring and summer period. If you do not monitor them they may even start laying in Autumn. These two decided to be fledglings in June (almost dead of winter)
Gouldians – difficult to pinpoint as my Gouldians have bred only once in 2 years. The aviary is quite busy, and wit the hustle and bustle it is very possible that they abandon the nest early on.