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Sharpbranded frog (lat. RANA arvalis), or sharpbranded, swamp frog a detachment of free amphibians, the family real frogs.

Description

Sharpbranded, or swamp frog a tiny amphibian, no more than 7 cm. It belongs to brown frogs, t.e. Its color is habitually brownish, with camouflage due to darker spots or dots with such a decoration, the frog is almost invisible in the wrinkled grass and leaves. Interestingly, during the spring year, males of this amphibian acquire a silver-blue color color. During this period, their first fingers of the front limbs appear socalled marriage corns that are designed to hold females.

The species lives not in the aquatic environment, but on land the habitual environment of its habitat is forest, foreststeppes located in floodplain landscapes.

The main sign of the identification of this species can be called a dark noticeable spot in the temporal region, located from the eyes to the shoulder, and the muzzle of a pointed type.

Appearance

Swamp frog in appearance is very reminiscent of a herbal frog. Its mass does not exceed 30 grams in size up to 7 cm. The back of this amphibian is light-olive or reddish-brick, sometimes even a black shade, but the abdomen, on the contrary, is in light tones and plain tones and plain.

Moreover, the overall tone of the color of these frogs can change here everything will depend on the ambient temperature, its moisture and light level. So, on sunny days, amphibians will look an order of magnitude lighter the same applies to frogs that live in open places. Their coloring to the level is lighter than amphibians living in thick and wet thickets of grass or shrubs.

The swamp frog is characterized by a polymorphic pattern of the backso, the lower body of the body is a break and throatpainted in lighter colors (almost white, sometimes with a yellowish color) than the upper part.

Where it lives

This type of amphibian is common in the north-eastern part of Europe-this is France, Sweden and Finland, as well as in its southern part-to the coast of the Adriatic Sea and eastward-before the Urals. It can also be found in Siberia (both western and middle), as well as in the northern part of Kazakhstan. In the eastern direction, the range of her habitat reaches Yakutia, up to the Baikal.

It is the swamp frog that is the only type of amphibian who lives in the tundra.

This amphibian is found in the forest, foreststeppe and steppe zone, found in meadows, swamps and arable lands, even in semideserts and in mountainous areas but not higher than 800 m above the sea.

This type of amphibians is rightfully called the most droughtresistant among other frogs it can be found in many of the most diverse places.

A sharpnasty frog can be seen in the fields, in parks, on the roads and not far from housing but this amphibian prefers deciduous forests for habitat (usually alder, oaks and birch), as well as floodplain meadows.

But, like any amphibian, this frog is not able to exist without the presence of a nearby water spaces suitable for propagation.

Lifestyle

A sharpbranded frog is especially active at twilight, but it can be seen without problems in the daytime. Upon a set of favorable circumstances and the conditions of amphibia, he prefers to stay in the usual territory and does not move away from the place of residence further than 30 meters. But this does not mean that this species is not able to move frogs are also made rather distant migrations (usually in the summer) in search of sites with favorable conditions of existence and rich in food. Unlike a herbal frog, prisoner prefers precisely a terrestrial, not a water lifestyle.

Like almost all amphibians, swamp frog to feed on land, and its diet is invertebrate: mosquitoes, flies, gadflies, mollusks and various water invertebrates.

The frog itself is the link of the food chain and becomes the prey of various species of birds and mammals, including reptiles (snakes, lizards) and other species. Young animals and tadpoles often become victims of other frogs, including their relatives.

These frogs not only feed, but also winter on land: at the time of the cold weather, they simply hide in pits, burrows, stones, stumps and hollows, in heaps of foliage and even basements.

Reproduction

This species draws a significant part of its existence frogs usually descend to the water for throwing caviar.

The process of breeding frogs occurs with the arrival of heat usually in late spring, when the ambient temperature rises to stable 12 degrees.

Females lay the game in the coastal areas of forest ponds (usually small), sometimes even the bottom, to the depths but not more than 10 cm and in their appearance their caviar resembles a large lump of mucus.

For approximately a few weeks develop, and the tadpoles, which are hatched from eggs, develop into an adult individual for two months. Most of the tadpoles do not live to this form especially in the dry period, when there is a high risk of drying out of the reservoirs. These amphibians become sexually mature through the impressive three years of existence.

Red Book

A sharp-branded frog in its number is an order of magnitude inferior to its competitor-a herbal frog-and back in the 2000s (until 2010) it was impossible to observe a more or less impressive cluster of this type of amphibian during the period of labeling.

Swamp Frog is a familiar resident of forest and meadow natural biotopes, as well as their other types. In Moscow, it is significantly larger than a grass frog can feel the effect of an urban environment. This is primarily due to the fact that this species selects heated reservoirs for its reproduction, and such natural territories are located, as a rule, in actively visited places edges or clearings.

By 2001, the condition of this species was deplorable if we take into account the territory of Moscow and it literally disappeared in many of its regions, and in others is in critical condition.

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