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The most common type of woodpecker family, in Mexico and the southwestern United States (California and Oregon), is the acorn woodpecker. The main condition for the habitat of these birds is the presence of acorns, because somehow they settle in tropical deciduous and coniferous forests, in the neighborhood where there are oak trees, as well as in oak. This type of woodpecker differs from its congeners unique feature, which does not have none of the species.



The fact that it stores for the winter acorns, pushing them into the grooves carved into tree trunks. At first glance, it would seem, is nothing surprising, because in this way stocking many birds and animals, but the fact that on the same tree can be seen even before the 60,000 hidden acorns. Naturally, such a bird do not under force, and a group of several individuals. Each pack has its territory for habitat and food, which they jointly guard and protect from strangers.





Acorn woodpeckers live in close-knit packs, sedentary way. Usually, a pack consists of 6 - 10 adult birds, not counting the young. The group can be up to 5-7 males, and so during the breeding flock reigns much competition for the right to mate with females. Males try to interfere with each other during mating. Standing pairs of birds do not form, and no sympathy for each other do not have.



Adults woodpecker feathers have brownish black on the back, tail and wings, and bottom - the abdomen, neck and tail - white-variegated. White forehead with a strong greenish-black beak, eyes and snow-white. A female from the male can be distinguished only by a red cap on his head. For females it is separated from the white forehead black stripe, the male - solid.



The staple food of woodpeckers are becoming acorns, hence the name - acorn woodpecker. Storage for their reserves they use the trunks of dead trees, wooden poles and even the walls of the old wooden buildings. Each acorn bird look for recess right size, so they spend a lot of time to equip the appropriate warehouse. In addition to the diet of acorn woodpeckers also includes a variety of insects, which they grab on the fly.





Acorn woodpeckers nest in tree holes, which appear several times over the years. All the flocks of females lay eggs in one nest and then hatch chicks, males and females alternately for 11-14 days. The young grow very quickly, and in the months of age fly out of the nest.





ZHELUDЁVY woodpecker (Melanerpes formicivorus) makes a huge reserves. In the autumn he hollows in the trunks and large branches of oaks, eucalyptus, pine, sycamore and even telegraph poles and walls of wooden houses, many thousands of small potholes - cells, each of which drives firmly on acorns. The amount of such pantries are impressive: in a mountain forest California, counted 20 thousand. Acorns, have been driven into the bark of sycamore woodpecker, and the bark of another tree - a pine found about 50 thousand. Acorns! Remarkable these woodpeckers and that is usually all year round, they live in groups of 3-12 birds. Each group takes a large area, from which foreign individuals expelled. In defense of the territory of the participation of all members of the group; all involved in the storing acorns and collectively the use of their reserves.



In the spring the group is not divided into pairs, all the females lay their eggs in groups of one common nest. In laying hatching and fledging attended by all members of the group. However, often (in some years and in some places) can be found a pair of birds, leading typically monogamous lifestyle, but it is in most cases temporary



Source: masterok.livejournal.com