what is the structure of the bird's nest like? how does it manage to be stable and strong?

Answer 1

A grass/twig nest is woven, such that individual pieces are in frictional contact with several other pieces. Some birds (e.g., swifts) use saliva to cement the peices in place. In fact the asian swiftlet builds its nest entirely of saliva. Such nests are a prized delicacy in China (bird's nest soup). See the ref. on bird nests (about 1/3 down the page).

Answer 2

Depend on the species of the bird, commonly the nest is bowl shaped and sometimes deeper to provide warm for the baby bird. Some are inverted bottle shape, in rare case. The nest is normally build on shady trees, to provide shade and on the junction of the stem to provide strong grip.

Answer 3

A nest is place of refuge built to hold an animal's eggs and/or provide a place to raise their offspring. They are usually made of some organic material such as twigs, grass, and leaves; or may simply be a depression in the ground, or a hole in a tree, rock or building. Sometimes available human made materials such as string, plastic, cloth, hair, paper, etc. may be used as well.

Generally each species has a distinctive style of nest. Nests can be found in many different habitats.

Nests are built primarily by birds, but also by mammals, fish, insects and reptiles.

They may have some or all of the following zones: attachment; outer decorative layer; structural layer; lining.

Some birds will build nests in trees, some (such as vultures, eagles, and many seabirds like Kittiwakes) will build them on rocky ledges, and others nest on the ground or in burrows.

There are eight mutually exclusive nest shapes:

Above ground
cup nest
dome
dome and tube
plate
On the ground
bed
scrape
mound
Below ground
burrow


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Answer 4

It varies widely by birds, you'll have to be more specific. In some cases, it's not very stable or strong. But it usually gets the job done.

Answer 5

Birds nests are woven and sometimes spit or mud is added like glue. The nest is often woven onto branches or something to give it a solid base.

Answer 6

it's shaped into a bowl and bird's use grass wraped around the twig to keep them together.