Java sparrow: incubation period, weaning age and breeding
Java sparrow eggs hatch after 13–14 days of incubation. Chicks fledge at 26–28 days and are weaned and independent at about 45–55 days. A typical clutch is 4–7 eggs.
Breeding numbers
| Item | Value |
|---|---|
| Adult weight (g) | 22-27 |
| Length (cm) | 15-17 |
| Clutch size | 4-7 |
| Incubation (days) | 13-14 |
| Fledging (days) | 26-28 |
| Weaning / independence (days) | 45-55 |
| Breeding age (maturity) | 6–9 months |
| Lifespan (years) | 7-10 |
| Breeding season | Mild seasons; Oct-Apr in hot countries |
| Sexing | Cock: thicker beak with swollen base, broader red eye-ring, sings/dances; DNA advised. |
Origin: Java and Bali, Indonesia — Scientific name: Padda oryzivora
Size: 15-17 cm, 24-28 g
Breeding and care tips
Robust bird needing a roomy cage and closed nest box; prefers quiet and moderate humidity. White x white pairings reduce hatchability.
Mutations and colours
Mutations Zajel calculates: Dominant white, Agate. Named only (not confirmed or polygenic — not used in the calculation): Pied (sakura), Fawn (isabel / cinnamon), Mocha brown, Silver (opal), Topaz, Pastel.
Zajel's genetics lab predicts chick colours from both parents for established mutations only; disputed ones are shown with a note and left out of the calculation.
Need the exact date? Use the egg hatch calculator and the weaning age chart.
Related species
Frequently asked questions
How long do Java sparrow eggs take to hatch?
Java sparrow eggs hatch after 13-14 days of incubation.
How many eggs does a Java sparrow lay?
Usually 4-7 eggs per clutch.
When do Java sparrow chicks leave the nest?
Chicks fledge at about 26-28 days old.
When are Java sparrow chicks weaned?
They are weaned and independent at about 45-55 days.
At what age can a Java sparrow breed?
A Java sparrow reaches breeding age at about 6–9 months; pairing earlier is not advised.
What is the Java sparrow breeding season?
Mild seasons; Oct-Apr in hot countries
How do you tell a male Java sparrow from a female?
Cock: thicker beak with swollen base, broader red eye-ring, sings/dances; DNA advised.
How long does a Java sparrow live?
About 7-10 years with good care.