Bird World - Part 5 Blue Jay Cyanocitta cristata is common in eastern North America except the extreme north, and inhabits both deciduous and coniferous forests, the photo shows the bird removal of faecalsac parent nest. This is how most small birds keep their nests clean and tidy, young produce their excrement into a kind of natural polyethylene bag, which is removed by an adult and eaten or a certain distance nest. This is important, not so much for reasons of hygiene for the protection of the nest against predators. white droppings near the nest attracts the attention on the site.
The Blue Jay is often migratory, especially in the northernmost parts of its range, it is "intrusive". A number of bird species, especially those occurring at or near the Arctic, the subject of invasions, migrations are caused by sudden shortage of food for bird populations, sometimes these outbreaks will be hundreds of miles of birds outside their normal range, and new areas may be colonized.
The third case is illustrated Waxwing Bombycilla cedorum, which is also rather dependent on food supply to their seasonal migrations, but it is rarely as intrusive as its close relative, waxwings, which is also found in Europe. It derives its name from the color of wax, such as fins.
The chicks are fed almost exclusively on insects, but after they left the nest of their diet gradually changes the fruit, especially berries. The berries are almost exclusively those of wild plants. Thus, the cedar waxwing is rarely harmful to agriculture, in fact, it is often useful to farmers, because during the breeding season it consumes large numbers of insect pests, including beetles and gypsy moths. Finches and buntings small occur in most regions of the world. They are often pleasantly feathers and many of them have nice songs, and consequently they are popular as caged birds. Many of them can subsist largely on seeds that also makes them suitable as cage birds.
Although sparrows are quite common in the northern hemisphere, the Golden-breasted Bunting Emberiza flaviventris is one of relatively few species occurring in southern Africa. Its plumage striking sets it apart from other species, which are often rather drab brown bird. It is a little dry, wooded areas.
The Goldfinch Carduelis carduelis is both common and widespread throughout Europe. It has also been introduced in many other parts of the world, including North America, Australia and New Zealand. In its European origin, it can often be seen on thistles growing on open ground, especially on the edge of farmland. It breeds in hedgerows, orchards and parks, and built a neat, cup-shaped nest, which is often very well hidden. The nest is constructed from fine roots, herbs, moss and leaves, and is lined with down, feathers and wool.
The chicks are fed mainly on insects and their larvae, but once out of the nest soon they begin to feed on seeds. The goldfinch is generally considered very useful to agriculture than the seeds which it feeds mainly those that are a nuisance to the farmer-ragwort, thistles and other weeds. In late fall goldfinches and their families gathered in herds, or "charms", as they are well known.
The Acanthis flammea Redpoll is a widespread species occurring around the northern hemisphere, both in the New World and Old World. It's a bird of temperate forests, breeding in the north woods, in the Arctic regions, it is usually replaced by a closely related species, the Arctic Redpoll. The planting of coniferous forest plantations has led to an increase in the number of redpolls in many parts of their range. In winter, t.
Posted on March 29, 2010.