The weaver and the widow
Almost all of weaverbirds and 68 species live in Africa. Only few of them live in South Asia, Madagascar and southern Arabia. Many of them are similar to sparrows, but painted bright and colorful. Perhaps, none of the birds had not mastered this art of weaving nests, as weaverbirds. It is “weaving”, even knitting a specific pattern. Fiber, picked at random from plants, bird several times passes via the fingers into a loop and then takes the bill to the end of the “rope” and firmly tighten the loop.
These weaverbirds weave nests of males. Females only finish the interior of the house finished lining spherical “floor” soft materials and under the roof weave “ceiling” —apparently, additional protection (insulation) from the tropical sun. Each male weaves the nest for several females, and then leaves them, giving themselves to sit and feed in a cozy house offspring. Living in the savannas of the weaverbirds nests in trees in large colonies — up to a hundred nests on a single acacia or baobab tree.’ Each hanging on the end of the branch, and from a distance they all look like large fruits.
Every construction starts with billet material. Tsepov beak narrow strip of palm leaf, tkacik flies and pulls her along, and then tears off the desired size of the workpiece. Social weaverbirds forces many semasiologist General apartment house. On the strong females big tree (now often on telephone poles!) stack the branches and the grass grows outwards and upwards some semblance of a thatched roof. The diameter of the old, many years build nests of social weavers there are about three or even five meters. Birds for generations, dozens, sometimes hundreds of years living in them while under the weight of their home will not collapse to the ground bitches together with the entire building. Below, under common roof, there are separate apartments for each family.
The collection waxbills (embellished, or blood-red weaverbirds) is 125 species. They live in Africa, southern Asia, Australia. These birds are amazing colors: bright red, yellow, blue, black, green and many other colors. Colors blend amazingly colorful, gracefully and tastefully, not “vulgar” like, say, parrots. Many of the waxbills, African amarantha for example, fashionable now among fans as the birds room.
Nests of waxbills as real weaverbirds, but is less complex weave. Except those that hatch nestlings, birds build nests and joint nights. And what else is interesting. I drink water (at least, some Australian waxbills) are not like, say, chickens or sparrows, with every SIP of water rising from the head, and sucking it, plunging into the water all over your face.
Chicks of waxbills in the corners of the mouth yellow, white, blue, sometimes bordered with a black ring round the tubercles, and on the palate, the tongue and the edges of the beak are black dots and stripes. Mouth visible in the dim light of the nest, especially as many of the waxbills are these colorful bumps, reflecting the rays, glow in the dark. But youngsters have a different subspecies of the colours and the basic colours of the decorations of the mouth different. Not the same color and bare skin of the body or thick fluff, special sound squeak and cry and dissimilar manners to turn heads, begging for food. It would seem that their nestlings, are endowed with such clear signs to distinguish foundlings from the front of the waxbills are easy. And no cuckoo they won’t. But. Why nature is so favorable to the parasites? What clever tricks has given them. The nestlings of each species of weaverbirds-widows of the mouth and body are the same signs and the like, as the young waxbills are exactly the kind that the care which they give their offspring,
Amazing bird widow! Them 15 species, all parasites. Nests are not built. Throw eggs in the nests of waxbills. Moreover, if the cuckoos wide range of birds-educators, here specialization: Chicks of each species of waxbills widows raising is also one of some sort. Places birds ‘ nests filled with other people’s foundlings to the full.
It would seem that with such a parasitic load waxbills are doomed to speedy extinction. It would, of course, have happened if the Chicks widows dealt with children of their adoptive parents, as cuculata. But here, things are otherwise: don’t kill and don’t throw the Chicks-widow of its small neighbors in the nest, and feed them peacefully with the parent offerings. Together growing up and after leaving the nest some time living a friendly flock. There is important in their lives is learning: juveniles learn songs of their foster parents. Later, as adults, males of widows sing the same songs! And females only when the males are married, who sing like the waxbills, in nests which they grew, and only in those nests later throw eggs whose owners are singing the familiar childhood melodies.
Nest parasitism in the family tkacikova, except the widows, practiced only in one species of weaver-cuckoos. But he has no narrow specialization in the choice of certain nests or imitation of the birds-teachers in the coloration of birds and singing males.