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Home Life of Birds
The eggs. The most common colors found among birds’ eggs arc white and various shades of brown and blue. It seems to be a general rule that eggs which are laid in cavities, where they are not easily seen, like the woodpeckers’, are white; and those which are laid in more exposed positions take on some brighter color. But there are exceptions to these generalizations. Some eggs are of a uniform color, while others are spotted or mottled. The number of eggs laid varies from one to twenty. For most of our common land-birds the number ranges from four to six.
Incubation. The period of incubation ranges from twelve days for a small bird like the chipping sparro to twenty-eight days for a large bird like the osprey. The larger the egg, the longer the time usually required for incubation. The work of incubation is done chiefly by the female, but in sonic cases the male may help, or the male may feed the female on the nest. While the female is incubating the eggs, one of the chief duties of the male is to drive away any intruding birds or anj7nk that may come within
a certain distance.
Condition of young at birth. For the most part the lower forms of birds are precocial, the young being ready to walk when first hatched; the higher forms are altricial, the young being helpless and requiring the care of the parents. This constant care of the young is a sign of advancement among all animals. Probably the first birds were all precocial and some gradually evolved the altricial habit.
Time in nest. The time that the altricial birds remain in the nest varies with the size of the birds. In general the larger birds remain longer in the nest than do the smaller birds. In the case of the song sparrow, the young may leave the nest at the end of a week, while some birds may remain several months in the nest; but for most of our common birds the time averages about two weeks.
The following tables give in brief form some facts regarding the nesting-habits of a few birds. These figures represent observations made of a particular pair of birds. Observations on other birds of the same species would doubtless give different figures. But these results give at least an approximate idea of the time involved in these various activities. The incompleteness of this table suggests how many things are yet to be learned about the habits of our common birds.
The work of the parent birds in rearing their young consists chiefly in three activities: feeding the young, cleaning the nest, and brooding the young.
Yahoo! News Search Results for bird nests
Yahoo! News Search Results for bird nests
Teacher on bird-watching expedition
Todd Menadier, a high school science and sustainable energy teacher at Bloomfield Tech High School in Bloomfield, joined an Earthwatch research team for a 10-day expedition in Wyoming to help scientists understand how the local bird population is affected by land development and climate change.
Good bird, bad bird
A snake is threatening birds.
Erik Natzke
One of the pioneers of generative art, Erik Natzke is a hero within the Flash community and beyond. Garrick Webster asks him about his career, coding, interactivity, bird nests ? and his latest projects
Swift response to bird appeal
SWIFTS in Oxfordshire have been given a helping hand on to the property ladder after volunteers built them new homes.
Preserve to house endangered bird
Endangered Golden-cheeked Warblers may have a new safe-haven in Hays County by the end of the year. Hays County Commissioners voted to allow the Nature Conservancy and County staff to negotiate the purchase of 1,000 acres of land for the preserve. The land is located in western Hays County and is a part of the 3,300-acre Nicholson family ranch. It is valued at about $5 million and would be ...
Sandhills in crosshairs
What was once considered a true wildlife success story, the sandhill crane, is now almost a true wildlife nightmare.
Make your landscape inviting to birds
If you can provide a place for birds to nest, you'll have the pleasure of seeing them frequently at close range and have the advantage of allies in the control of insects.
New hope for a restored Jamaica Bay
Threatened with a lawsuit from several environmental organizations, the city and state have agreed in principal to upgrade sewage treatment plants on Jamaica Bay in the hope of improving water quality.
Dalai Lama to chicken farmers: Let your hens roam and your eggs be salmonella...
When it comes to folks getting their feathers ruffled amid the largest egg recall in U.S. history, which people jump to mind? Federal investigators? Of course. Lawmakers? Food safety experts? Sure. The Dalai Lama? It?s true. The Nobel Peace Prize...
Michael McCarthy: The sparrow that survived Mao's purge
Recently in The Independent we summarised the 10 years of our campaign to save the house sparrow, which has largely disappeared from central London for reasons which remain a mystery. In terms of sparrow stories, this vanishing act is hard to beat. Yet there is another sorrowful sparrow tale which is up there with it, in terms of drama, and which bears retelling.
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