Millions of eggs get laid a day by chicken and other birds including ducks.
A single chicken can lay at most one egg per day, although some chickens may not lay an egg every day.
The process of a chicken producing and laying eggs takes 24 hours to 26 hours, which leads to a skipped day before the next egg is laid.
High production chicken breeds can lay between 5 to 6 eggs per week, which is around 300 eggs a year.
And other chickens lay less amounts of eggs per day.
Even factors like the chickens age, breed, light and nutrition also influence the egg laying rate.
It takes a hen 24 hours to 26 hours to form an egg, which means that she lays a little later each day until she skips a day of laying eggs to reset her egg laying cycle.
Some chicken breeds like Leghorn, Black Stars etc are bred for high output of eggs like 300 or more eggs per year and others lay less eggs.
Hens also lay eggs the best when they're in their first 1 to 2 years of life, and production of eggs in hens declines as the chicken or hen ages.
Hens also need at least 14 hours to 16 hours of sunlight or light to maintain peak laying and shorter days, such as in fall or winter reduce the egg production unless supplemental light is provided.
Hens also naturally stop laying eggs for a period each year to regrow their feathers, which is usually in the fall.
And good diet and low stress in chickens or hens is also crucial for consistent egg laying.
Leghorn chickens and ISA brown chickens are excellent egg layers and average 250 to 300 or more eggs a year.
Barred Rocks and Rhode Island Chicken breeds are good egg layers which average 200 to 250 eggs laid a year.
And some breeds or older hens may only lay 80 to 150 eggs a year or less.