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How curious is the structure of the nest of the goldfinch or chaffinch!
The inside of it is lined with cotton and fine silken threads; and the
outside cannot be sufficiently admired, though it is composed only of
various species of fine moss. The colour of these mosses, resembling
that of the bark of the tree on which the nest is built, proves that the
bird intended it should not be easily discovered. In some nests, hair,
wool, and rushes are dexterously interwoven. In some, all the parts are
firmly fastened by a thread, which the bird makes of hemp, wool, hair,
or more commonly of spiders' webs. Other birds, as for instance the
blackbird and the lapwing, after they have constructed their nest,
plaster the inside with mortar, which cements and binds the whole
together; they then stick upon it, while quite wet, some wool or moss,
to give it the necessary degree of warmth. The nests of swallows are of
a very different construction from those of other birds. They require
neither wood, nor hay, nor cords; they make a kind of mortar, with
which they form a neat, secure, and comfortable habitation for
themselves and their family. To moisten the dust, of which they build
their nest, they dip their breasts in water and shake the drops from
their wet feathers upon it.
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