Soon after hatching, the young bluebirds begin sprouting feathers. The female incubates the eggs for about 12 days. She lays one light blue egg per day for about 4 to 6 days. The female begins the first nest in mid-April. Normally bluebirds produce two to three broods per year in Alabama. Build the boxes to prevent larger birds, such as starlings, from using them.
Fortunately, the bluebird will also use human-made cavities, such as boxes, for nesting. These exotic species are very aggressive and take cavities or boxes bluebirds could use or destroy occupied nests. These cavities are often hard to find because nonnative species, such as the house sparrow and starling, also use cavities for nesting. In these areas, the bluebird tries to find a hollow tree (cavity tree) in which to build a loosely woven nest of grasses. The bluebird, like the robin, prefers open areas such as roadsides, cutover woodlands, old orchards, parks, and yards in cities and towns. Youth organizations and school classes can build and maintain bluebird boxes for educational and money-making projects. It is easily attracted to homes and surrounding open areas when nesting boxes are correctly constructed and properly placed. Observing this beautiful bird can bring hours of enjoyment. However females are a grayish-blue with duller rust- colored breast. These birds get their namesake by this vibrant coloration on males. Let file = fs.createWriteStream(dir + '/' + image.id + '.The early American settlers called it the blue robin because of its rust-colored breast and blue back and tail. import Promise from 'bluebird' Ĭonsole.log("Opening image " + image.id) However, in my code only the first promise in the chain appears to be waited for by map(), and many request and disk writes happen in parallel. To me, it sounds like the returned promise should only be fulfilled when the whole chain has been fulfilled. I want to limit the number of parallel requests and disk writes.Īs I understand it, Promise.map() with should do what I want.īecause pipe() and http.get() can't automatically be promisified, I'm trying to use custom promises.īut I don't fully understand the then() mechanism. I'm writing a bulk downloader for node.js and trying to understand bluebird promises.
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