Tip 1: Why do rooks fly in the first spring
Tip 1: Why do rooks fly in the first spring
Since ancient times, people in Russia knew - if rooks arrived, it means spring has come. With these migratory birds returning in the beginning of March, various other signs connected also.
Return of the rooks
There are more than 50 species of migratory birds that leave Russia in the fall and return in the spring.Rooks are migratory birds. In the autumn in October they fly to the southwest - to the Caucasus, to Turkmenistan, part - to Afghanistan, India, Africa, etc. Shoals of birds in the sky stretch for miles. Periodically, they fall to the ground to find food for themselves, for example, in corn fields. In spring, rooks are the first birds that return to the middle belt of Russia from the south. Almost simultaneously with them, starlings fly, in some regions of the country they return even before rooks. By the end of March, finches fly, and other migratory birds follow them.
Climate change and global warming are making corrections - more and more migratory birds remain wintering in the middle zone of Russia, becoming sedentary.Rooks arrive first along with starlings untilit's still cold and snow has not come down, because such cool weather for them is not terrible. They nest a friendly colony in the trees. These birds are attached to their nests and are eager to re-occupy them. Returning to his native nest, the rook first repairs it - brings dry branches, twigs, lining the bottom with grass, scraps of animal fur, etc. They are often found in the fields where plowing is taking place. Males are looking for larvae of insects and worms in the loosened ground to feed the chicks while the female remains in the nest and warms them. These birds take great care of their offspring, even when the chicks are growing up.
Folk signs
According to the national calendar, rooks needexpect on the "Gerasim Grachevnik" - March 17 (March 4 new style), but if they arrived earlier, they saw a bad sign and were waiting for a hungry year. To bring warming nearer, people baked birds from rye dough. On the day of arrival, the rooks were avoided putting on new bast shoes because of superstition, so that there would be no trouble. Day Gerasim Grachevnika received its name in the peasant Russian calendar in honor of Christian saints: Gerasim of Vologda and Gerasim of Jordan. About March 17, said that Gerasim-Grachevnik drove the rooks. With the arrival of these birds, many people's signs were associated. It was believed that a month after their return snow falls; that rooks play foreshadow good weather; that fussy behavior of birds - to change of weather; that three weeks after rooks have made their nests, you can sow.Tip 2: Why it's snowing
Such phenomena of nature as snow, hail, rain occur constantly. Their origin does not belong to riddles. The reason for this is snow, it is understandable and understandable even for the child.
Water, which is on the surface of the Earth,gradually evaporates. This process occurs at any temperature, therefore in air there is always a certain amount of water vapor. Water vapor is a small drop of water that evaporates from the surface, rivers, lakes, seas and oceans under the influence of sunlight. Water vapor rises and meets on its way a lot of small particles - dust particles, which become the center of attraction of water molecules. At temperatures above zero degrees, steam gradually turns into droplets and forms clouds. At a negative temperature, which is necessary for the transformation of water into ice, the drops freeze, gradually gain weight and fall to the Earth. This phenomenon is called snowPerhaps some will reflect on why snow not like ice, it is not transparent or hard. The explanation is simple: a snowflake is a cluster of tiny ice crystals that are reflected from each other and form a white color. Hardness of the snowflakes is not, because the crystals that form it, are too small to withstand any pressure. Scientists have established several interesting facts about snowflakes. Crystals that form snowflakes have different shapes: rectangular, square, needle-shaped. But from whatever crystals there was a snowflake, it always has six facets. And each is unique. Scientists have never met two identical snowflakes. In some places of our planet people met with such an unusual phenomenon as color snow. And indeed, snowflakes are not onlywhite. They can take red, green, blue and even black. This is because, falling to the ground, snowflakes absorb fungi or bacteria that are in the atmosphere.
