Monday, June 22, 2009

 


Basic pigments/Colors

The basic pattern of Columba livia in its wild type and domestic form is "blue bar". This is a subtle intermix of the pigment, melanin, which produces dove gray and black. A green/purple iridescence caused by the structure of the feather, itself, is seen on the neck and chest front. Males tend to show more of this iridescence than females, but the difference is sometimes subtle. The blue bar pattern gets its name from two black bars which cross the wing toward the back. There is also a sub-terminal tail bar about a quarter inch (6 mm) from the end of the tail. Personally, I find the blue bar pigeon so attractive that I'm sure if pigeons weren't so ubiquitous that birders would count themselves lucky to catch a glimpse of such a beautiful creature.

Another very common pattern is checker (chequer, check). This is similar to the blue bar pattern but also has many little black marks across the entire wing shield. Checker exists in a few different alleles (alternatives) and may range from light to T-Patter (a very dark check which almost totally covers the light blue of the shield.) Barless, a pattern with no black bars or checks across the wingshield, is rare and found mainly in breeds of Central European ancestry. Each of these three patterns may also be found in the other two pigment series which the domestic pigeon has. The other series are Ash-red and brown. Birds are normally designated by both their color and pattern, e.g., a red bar; brown check, dark blue check, etc. Because the history of the pigeon encompasses many lands and even more centuries, breed traditions sometimes dictate a difference in color/pattern names. A red bar pigeon with some white on its head is often called a silver (or mealy) pied by a racing homer breeder but the same colored bird would be known as a silver badge by a Birmingham roller breeder. Because of this, in these articles, I will be using the genetic designations of color, pigment and pattern and explaining their usage as I go.

Other common colors include white, black, recessive red, pied, splash, grizzle, as well as fantastic and subtle colorations produced by many modifying mutations. These mutations, coupled with the selection of three millennia of breeders worldwide, have produced birds which in pattern, color, feather ornaments, body type and behavior could easily be mistaken for wild species. 


Food/Housing


Pigeons are grain eaters. Most feed stores stock an adequate mix for them. Depending upon the time of year and whether breeding youngsters or not, the birds usually get a mix which ranges between 12% and 17% protein. Protein percentages higher than that for long periods of time often lead to gout or other problems for the birds. Pigeons also need a mineral grit mixture (chicken grit is not suitable for pigeons). This grit mixture, too, can be purchased at most feed stores. Pigeons also need clean water daily. All three items are usually fed separately. Pigeons appreciate green food: romaine lettuce, etc., but this is not necessary and millions of birds have been reared without it. It is essential that every effort is made to keep the water, feed and grit clean with no contamination allowed. If this is done, pigeons are extremely hardy animals. If not, the breeder is leaving his stock open to various bacteriological and parasitic infections. But then, this is just common sense. Unless you're a dung beetle larva, the idea of fecal pellets for breakfast is not particularly appealing.

The most important requirement as to pigeon housing is that the interior always be kept dry. Dampness brings disease. Pigeons are not ducks. Accommodations for pigeons range from luxurious racing lofts which costs upwards of a half million dollars to converted tool sheds. So long as feed is kept clean and the interior dry, each houses the birds just fine.


Breeding & Incubation

The domestic pigeon normally reaches sexual maturity at about five to six months of age. Depending on the local temperatures and food supply, they may breed all year round. Many fanciers, however, prevent them from breeding continuously -- either by separating the sexes, or by letting mated pairs sit on wooden (dummy) eggs.

Once mated, the male (cock) will begin to hunt for a suitable place to make a nest and rear young. Domestic pigeons do not nest in trees as do many other doves. They are descendants of a cliff dwelling species and prefer their nest to be on a solid surface. Most fanciers (breeders) also provide a nest bowl and some nesting materials (pine needles, tobacco stems, etc.) for the birds to use. The nest bowl helps to ensure that the eggs do not roll out from under the pair and chill.

Both male and female take part in the incubation and rearing of the young. Females lay their first egg about 10 days after mating, usually in the late afternoon or early evening. A second egg is laid about 44 hours later. Two eggs is the normal clutch size. Incubation commences with the laying of the second egg. The male (cock) bird usually broods from about 10 a.m. until 5 p.m., the female (hen) the rest of the time. Hatching normally occurs 18 days from start of incubation. Youngsters are fed by both parents -- and here is where pigeons/doves are unique. The parents need not even leave the nest to hunt down insects, etc., as do many other genera or species. Instead, they feed their young on a glandular crop secretion called "pigeon milk". It is not actually milk, and there is no lactose in it, but its production is stimulated by prolactin, the same hormone which stimulates milk production in mammals. Pigeon milk looks more like a cream-colored cottage cheese and is a high protein food which is fed to the youngsters from hatching till about ten days old when regurgitated grain and grit replace it as the major food source. Domestic pigeons usually have a seamless aluminum identity band placed on their leg at about ten days of age. This band is coded with year of hatch, club identification and a number. Youngsters fledge at about 35 days. However, when the young are about eighteen days old, the parents will often commence to renest. It is not uncommon for one round of youngsters to be fledging at the same time that next are hatching.



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