Site for children

THE MENAGERIE AT THE PORCH
HARES

RABBIT FUR COAT

The text already met two long-eared person: hare and hare. If they meet personally, you can enter into a legal marriage, the kids, the so-called cuffs will be quite viable. The hare, so named for the habit entirely to dress for winter in a white coat, in General, the forest-dweller, though he is not averse to look into the tundra or steppe. Rusak on winter camouflage robe is almost gets and loves the open space to the South of the forest zone, although not shy, say, rural land in the suburbs or Vladimirsky and generally the greater part of Europe. Rusak packs together to villages. Winter in the forest he hungry, and run hard: per square centimeter of his paws have 16-18, And the hare on the loose forest snow slides, like ski - load per square inch of his enormous paws, covered by a dense brush of hair, just 10 grams, ten times smaller than the wolf, and four times less than that of foxes.

Winter in the belly of the hare coat extends to the snow not to chill inside and regrown around the nostril hair, like a white handkerchief to cover his nose from the cold. But Rusak face in the dirt hit his winter coat twice the midst of summer. And that's what is remarkable: the biggest non (5.5 kg weight) where strashennye cold in the tundra of Western Siberia, and hare-heavyweights (7-8 kg) was chosen Bashkiria, where winter is not too hot. For the winter Bashkir brown white, but not to such a perfect state, as the non. In Crimea, Ukraine and Belarus hare story, and absolutely dwarfs (3 kg) live in Transcaucasia and Iran.

Let's dwarfs leave them alone and let shedding is an important factor in hare life. Who had been posted in snow white-previlage of the hare will notice only experienced eyes darken only the tips of the ears and nose. And even, perhaps, brown eyes. It is through the eyes go signal to hare the dressing. At least, so says a solid guide to comparative physiology of animals. Daylight reduces the hare is prepared for winter, day extended - animal goes to a summer dress. For this simple phrase hidden complex perturbations in the body of our long-eared neighbor. So, "physiologically brown" state of the hare is inextricably linked with high blood levels of gonadotropins and "physiologically white" - with their low concentration.

Rabbit fur often paint the dressers, but can be repainted and live hare, rather, to make sure that he will disguise. Long-eared holders fur physiologists were injected extracts of the pituitary gland, containing gonadotropic hormones, and they changed color, as if by magic, though not instantly, but first however. Thus, pituitary, and without eyes, the hare will not change. Occasionally from Siberia heard the news of the capture of pitch-black birds with one stone. What with their hormones?

Hormones hormones, but without the proper air temperature squint to change the coat anything. This is confirmed by scientific publication Century. Hayduk from Brest pedagogical Institute. After examining them 350 hares-Belyakov was exactly know that first autumn begins to fade the lower part of the hind legs, and the spring molt is exactly the opposite - starts on the head and the ridge, and ends on the feet. But that's not all - each parcel hare calf hair changes under strictly defined, so to say favorite, the temperature of the air. For example, in the autumn of the outer part of the ears changes color at a temperature range from +6° to -2°, and the inner bit earlier, when in the street a little warmer and brighter.

Yet the most important thing for hare equipment - light, light and light. Even in the pre-winter 1940/41 in the aviary of the Moscow zoo, where they lived the non evenings included bright bulbs and bewildered animals and went in winter, in summer clothes, but by the spring of the enclosure was covered with dark paper and it dropped the white fluffy balls.

In winter it is easy to understand where the hare and where Rusak, summer both hare some vaguely reddish-brown suit. And to be sure with whom you are dealing with, take a look at tails - in the midst of tailless hare's tail in winter and summer flaunts a black stripe. But tolai hare, or Sandstone, don't be confused; the name of this tiny creation itself says where he lives. And, finally, in deciduous forests ussuriland running hares last, the fourth species from inhabiting our country. This so-called Manchurian hare rare and very poorly understood.

We with you then perhaps it is better to talk only about Rusak da hare, for four hares would draw - you will not catch.

<< AgoMore >>

The menagerie at the porch

  © 2014 All children