They start laying eggs when they are about 1 year and 3 months later.
female cockatiels reach maturaly at age 1 they are fertile until age 8 and then become infertile.
Depending on the breed, they start laying around when they turn a year old.
usually about 18-20 weeks old before they actually begin laying eggs. -<3-
At approx. 5 months or 20 weeks your chicken should start laying eggs.
Most chickens are between 5-6 months old before they start laying eggs and will lay eggs for about two years. Some chickens will start laying at 4.5 months, but this is rare and probably due to hormones in their feed.
When they are 5 years old.
The chick starts to form in the egg as soon as temperature and humidity are within ideal parameters. Ideal temperature for incubation is 100 degrees F and humidity is 50%. Once the hen or the egg is set the chick will start it's 21 day journey to life outside the egg.
their moms come up on land and lay eggs then their mom leaves
Most chickens (i.e. Barred Rock, Rhode Island Reds, Leghorns) are between 5-6 months old before they start laying eggs. A mature/bright comb and waddle indicate a chicken is ready to start laying eggs. If you can fit 3 fingers between the pelvic bones, that also means they are ready to start laying eggs.
Here's my limited experience: Bobwhite quail hatched on 5/13/09. One egg was laid on 9/16/09. No other eggs to date. I have 5 males and 7 females housed together in a 3X5 raised pen. The pen is outdoors in Georgia. I had read that egg laying begins at 5-6 months, but one of mine obviously laid at 4 months. The shell was thin in some spots and thicker in other, which I'm told is typical for the first egg or two.
Orpingtons are fairly moderate early maturing and should lay their first egg at about 7 months old. Start them on laying mash at about 5 months for best eggs.
Maybe its too old to lay eggs now or its too cold to lay eggs
I raise true Araucana chickens and Araucana hens are usually a bit slow to start laying. On average in good conditions and with excellent lighting, the Araucana hens with lay their first eggs at around 5 to 6 months old. Americana chickens will often start to lay eggs much sooner at about 16 weeks of age.