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An Araucana egg (left) with white and brown eggs for comparison. The Araucana (Spanish: Gallina Mapuche) is a breed of domestic chicken from Chile. The name derives from the historic Araucanía region where it is believed to have originated. It lays blue-shelled eggs, one of very few breeds that do so.
Hens lay a good number of small white or cream eggs. [ 1 ] : 116 They are not given to broodiness as pullets , but can be when they reach two or three years of age. The breed is fast to mature, with hens laying by four and half months, and cockerels crowing at five or six weeks.
The Silverudd Blue, Swedish: Silverudds Blå, is a Swedish breed of chicken. It was developed by Martin Silverudd in Småland, in southern Sweden. Hens lay blue/green eggs, weighing 50–65 grams. [1] The flock-book for the breed is kept by the Svenska Kulturhönsföreningen – the Swedish Cultural Hen Association. [2]
In 1900, average egg production was 83 eggs per hen per year. In 2000, it was well over 300. In the United States, laying hens are butchered after their second egg laying season. In Europe, they are generally butchered after a single season. The laying period begins when the hen is about 18–20 weeks old (depending on breed and season).
The RSPCA "Welfare standards for laying hens and pullets" indicates that the stocking rate must not exceed 1,000 birds per hectare (10 m 2 per hen) of range available and a minimum area of overhead shade/shelter of 8 m 2 per 1,000 hens must be provided. Free-range farming of egg-laying hens is increasing its share of the market.
Sex-links come in several varieties. As hybrids of laying or dual-purpose breeds infused with extra vigor via heterosis, sex-links can be extremely good egg-layers which often produce 300 eggs a year or more depending on the quality of care and feed. The color of their eggs vary according to the mix of breeds, and blue-green eggs are possible.
In American usage, an Easter egger or Easter-egger is any hybrid or mixed-breed chicken resulting from the breeding of a bird carrying the blue egg (oocyan) gene with one that lays brown eggs. Eggs from such a bird may be any shade of blue or brown, [1]: 175 or occasionally pink or pale yellow. [2]
A study of female greater prairie-chickens in Kansas found that their survival rates were 1.6 to 2.0 times higher during the non-breeding season compared to the breeding season; this was due to heavy predation during nesting and brood-rearing. [16] One problem facing prairie-chickens is competition with the ring-necked pheasants. Pheasants lay ...