A very effective trick, which is performed alike by parrots and weaver birds, is the loading and firing of a miniature cannon. First the bird places some grains of powder in the muzzle of the cannon, then it rams these home with a ramrod. It next takes a lighted match from its master, which it applies to the touch-hole. The result is a report loud enough to scare every crow in the neighbourhood, but the little baya will remain perched on the gun, having apparently thoroughly enjoyed the performance.
The nest of the baya is one of the most wonderful things in nature. Description is unnecessary. Every one who has been in India has seen dozens of the hanging flask-shaped structures, while those who know not the Gorgeous East must be acquainted with the nest from pictures.
On account of its champagne-bottle shaped nest, the weaver is sometimes known as the bottle bird; I have also heard it called the hedge sparrow.
It makes no attempt to conceal its exquisitely woven nest. It relies for protection on inaccessibility, not concealment. Every animal badmash can see the nest, but cannot get at it. It hangs sufficiently high to be out of reach of all four-footed creatures. The ends of the entrance passage are frayed out so as to baffle all attempts on the part of squirrels and lizards to reach the treasures hidden away in it.
Both cock and hen work at the nest, the cock being the more industrious. The fibres of which it is composed are not found ready-made. The birds manufacture them out of the tall elephant grass which is so common in India. The weaver alights on one of the nearly upright blades and seizes with its beak a neighbouring blade near the base and makes a notch in it; it next seizes the edge of the blade above the notch and jerks its head away. By this means it strips off a thin strand of the leaf; it then proceeds to tear off in a similar manner a second strand, retaining the first one in its beak; in precisely the same way a third and perhaps a fourth strand are stripped off. The tearing process is not always continued to the extreme end of the blade; the various strands sometimes remain attached to the tip of the blade. The force with which the bird flies away usually suffices to complete the severance; sometimes, however, it is not effected so easily, and the bird is pulled back and swings in the air suspended by the strands it holds in its bill. Nothing daunted, the weaver makes a second attempt to fly away, and if this is not successful, continues until its efforts are crowned with success.
The grass which is used in nest construction is impregnated with silicon to such an extent that I experienced considerable difficulty in extricating from my pocket some of the fibres which, on one occasion, I took home with me. The material is thus eminently suitable for weaving purposes.
The fibres first collected are securely wound round the branch or leaf from which the nest will hang. The fibres added subsequently are plaited together until a stalk four or five inches long is formed; this is then expanded into a bell-shaped structure. The bell constitutes the roof of the nursery. When the roof is completed a loop is constructed across its base, so that the nest at this stage may be likened to an inverted basket with a handle.
Up to this point the cock and hen do the same kind of work, both fetch strips of grass or of palm leaves and weave these into the structure of the nest. But when once the loop or cross-bar is completed the hen takes up a position on it and makes the cock do all the bringing of material. She henceforth works from the interior of the nest and he from the exterior.
They push the fibres through the walls to one another. Thus the work progresses very rapidly. On one side of the loop the bell is closed up so as to form a chamber in which the eggs are laid, and the other half is prolonged into a neck, which becomes the entrance to the nest. This may be nearly a foot long; six inches is, however, a more usual length.
The entrance to the nursery is thus from below. The way the owners shoot vertically upwards into it, with closed wings, without perceptibly shaking it is really marvellous.