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Typically large numbers of eggs are laid at one time (an adult female cod can produce 4–6 million eggs in one spawning) and the eggs are then left to develop without parental care. When the larvae hatch from the egg, they often carry the remains of the yolk in a yolk sac which continues to nourish the larvae for a few days as they learn how ...
Ostrich eggs are the largest of all eggs, [4] though they are actually the smallest eggs relative to the size of the adult bird — on average they are 15 cm (5.9 in) long, 13 cm (5.1 in) wide, and weigh 1.4 kilograms (3.1 lb), over 20 times the weight of a chicken's egg and only 1 to 4% the size of the female. [5]
Bird eggs are a common food and one of the most versatile ingredients used in cooking. They are important in many branches of the modern food industry. [6] The most commonly used bird eggs are those from the chicken, duck, and goose. Smaller eggs, such as quail eggs, are used occasionally as a gourmet ingredient in Western countries.
Holiday baking and cold-weather stockpiling also increased demand, and prices to boot, with a dozen grade-A large eggs costing $4.15 in December, up from $2.51 the year before (a 36% increase).
Originally, the hen presumably laid one clutch, became broody, and incubated the eggs. Selective breeding over the centuries has produced hens that lay more eggs than they can hatch. Some of this progress was ancient, but most occurred after 1900. In 1900, average egg production was 83 eggs per hen per year. In 2000, it was well over 300.
The average cost in January of this year for a dozen Grade A eggs in the U.S. was $4.95 compared to $2.52 in January 2024. The price of a dozen eggs in December 2024 was $4.15.
At least two clutches are usually laid, and up to seven a year may be laid in the tropics or four a year in temperate latitudes. When fewer clutches are laid in a year, especially at higher latitudes, the number of eggs per clutch is greater. Central Asian house sparrows, which migrate and have only one clutch a year, average 6.5 eggs in a clutch.
We still use so many eggs." ... That's a more than 60% increase from the $2.51 it cost a year ago and 160% more than the $1.41 consumers paid for the same carton in 2019, ...