How do birds builds their nest. by SAFDAR 2013/08/28 16:49
HI friends i am going to tell you about the birds and their nests.
HI friends i am going to tell you about the birds and their nests.
SAFDAR 2013/08/28 16:55
The "Stitched" Nests of Tailor Birds
The tailor bird of India has abeak like a sewing needle. As thread, it uses silk from cobwebs, cotton from seeds,and fibers of tree bark. This bird selects two or more large green leaves growing close together at the end of a branch and pulls them together. It then punches holes along the edges of each leaf, and pulls the spider silk or plant fiber through the holes to sew the leaves together, finally tyingknots in each stitch to keep it from slipping. It does the same on the other side, stitching the leaves together, taking approximately six stitches tocurve a leaf around. Eventually the bird fills this resulting purse with grass. vFinally, it weaves another nest into the purse, where the female will lay her eggs.
The "Stitched" Nests of Tailor Birds
The tailor bird of India has abeak like a sewing needle. As thread, it uses silk from cobwebs, cotton from seeds,and fibers of tree bark. This bird selects two or more large green leaves growing close together at the end of a branch and pulls them together. It then punches holes along the edges of each leaf, and pulls the spider silk or plant fiber through the holes to sew the leaves together, finally tyingknots in each stitch to keep it from slipping. It does the same on the other side, stitching the leaves together, taking approximately six stitches tocurve a leaf around. Eventually the bird fills this resulting purse with grass. vFinally, it weaves another nest into the purse, where the female will lay her eggs.
SAFDAR 2013/08/28 17:07
Weaver Birds
Naturalists consider these birds' nests to be the most astonishing structures built by birds. This species uses plant fibers and tall plant stems to weave them selves extremely solid nests.
First of all, a weaver bird collects the building materials. It will cut long strips from leaves or extract the midrib from a fresh green leaf. There is a reason for its choice of fresh leaves: The veins of dry leaves would be stiff and brittle, too difficult to bend, but fresh ones make the work much easier. The weaver bird begins by tying the leaf fibers around the twig of a tree. With its foot, it holds down one end of the strip against the twig while taking the other end in its beak. To prevent the fibers from falling away, it ties them together with knots. Slowly it forms a circular shape that will become the entrance to the nest. Then it uses its beak to weave the other fibers together. During the weaving process, it must calculate the required tension, because if it's too weak, the nest will collapse. Also it needs to be able to visualize the finished structure, since while building the walls, it must determine where the structure needs to be widened.
Once it finishes weaving the entrance, it proceeds to weave the walls. To do so, ithangs upside down and keeps on working from the inside of the structure. It will push one fiber under another and pull it along with its beak, until it accomplishesa stunning weaving project.
The weaver bird won't just begin building its nest. It proceeds by calculating in advance what it needs to do nextfirst, collecting the most suitable building materials, then forming the entrance before going on to build the walls. It knows perfectly well where to thin or thicken the structure, and where to form a curve. Its behavior displays intelligence and skill, with no trace of inexperience. With no training, it can do two things at onceholding downone end of the fiber with its feet, while guiding the other end with its beak. None of its movements is coincidental; its every action is consciousand purposeful.
Another member of the weaver bird family builds a solid, rainproof nest. This bird obtains the perfect mortar by gathering plant fibers from the environment and mixing them with its saliva, which gives the plant fibers both elasticity and makes them water proof.
Weaver birds repeat this process until their nest is complete. It's no doubt impossible to claim that they have acquired these skills unconsciously, by chance. These birds construct their nests like an architect, construction engineer, and site foreman all rolled into one.
Another interesting example of nest building is performedby sociable weaver birds of southern Africa, which nest in a single huge, cooperatively built structure with separate entrances. With the ingenuity of accomplished architects, sociable weavers build these nests, some of which are home to as many as 600 birds.
Weaver Birds
Naturalists consider these birds' nests to be the most astonishing structures built by birds. This species uses plant fibers and tall plant stems to weave them selves extremely solid nests.
First of all, a weaver bird collects the building materials. It will cut long strips from leaves or extract the midrib from a fresh green leaf. There is a reason for its choice of fresh leaves: The veins of dry leaves would be stiff and brittle, too difficult to bend, but fresh ones make the work much easier. The weaver bird begins by tying the leaf fibers around the twig of a tree. With its foot, it holds down one end of the strip against the twig while taking the other end in its beak. To prevent the fibers from falling away, it ties them together with knots. Slowly it forms a circular shape that will become the entrance to the nest. Then it uses its beak to weave the other fibers together. During the weaving process, it must calculate the required tension, because if it's too weak, the nest will collapse. Also it needs to be able to visualize the finished structure, since while building the walls, it must determine where the structure needs to be widened.
Once it finishes weaving the entrance, it proceeds to weave the walls. To do so, ithangs upside down and keeps on working from the inside of the structure. It will push one fiber under another and pull it along with its beak, until it accomplishesa stunning weaving project.
The weaver bird won't just begin building its nest. It proceeds by calculating in advance what it needs to do nextfirst, collecting the most suitable building materials, then forming the entrance before going on to build the walls. It knows perfectly well where to thin or thicken the structure, and where to form a curve. Its behavior displays intelligence and skill, with no trace of inexperience. With no training, it can do two things at onceholding downone end of the fiber with its feet, while guiding the other end with its beak. None of its movements is coincidental; its every action is consciousand purposeful.
Another member of the weaver bird family builds a solid, rainproof nest. This bird obtains the perfect mortar by gathering plant fibers from the environment and mixing them with its saliva, which gives the plant fibers both elasticity and makes them water proof.
Weaver birds repeat this process until their nest is complete. It's no doubt impossible to claim that they have acquired these skills unconsciously, by chance. These birds construct their nests like an architect, construction engineer, and site foreman all rolled into one.
Another interesting example of nest building is performedby sociable weaver birds of southern Africa, which nest in a single huge, cooperatively built structure with separate entrances. With the ingenuity of accomplished architects, sociable weavers build these nests, some of which are home to as many as 600 birds.
HandsomeDon 2013/08/29 00:50
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