Preparing for winter

Endurance these frogs for the cold more than the green. However, the opinion that frogs can be frozen up to whatever the temperature, and then thawed, and she shall live, is wrong. At least NI Kalabuhov who did many experiments on the cooling of various animals came to this conclusion; amphibians are capable of without harm endure low temperatures only as long as the blood and juices of their bodies do not freeze. Once inside the body of a frog ice forms, the recovery becomes impossible and the animal dies. True, the blood can remain liquid in a state of so-called "supercooling" at temperatures below 0 °, but too cool frog can not stand is understandable why the frogs fall to the bottom of reservoirs. Indeed, until the water remains liquid, it is not covered with ice and cooled to 0 °. At the bottom of deeper waters, its temperature is kept around +4 °. However, NI Kalabuhov came to the conclusion that the newts, which are usually hibernate on land, may cool down very much, and for them this is not dangerous. Likewise, can be cooled to very low temperature small frogs and grass frogs come alive again with the return of warmth. Kalabuhov thinks that small animals generally easier to tolerate freezing. It remains still unclear: how to tolerate winter frogs overwintering on land? Surely in the pits, even if buried leaves and snow, the temperature drops below one degree below zero? Requires thorough and accurate observations. A circle of young naturalists could put in this direction interesting study. Toads hibernate on land only, getting pretty deep into the earth. It is known that the earth is frozen in general only up to a certain level below which it maintains a temperature above 0 °. Snow and grass roots penetrated the integument and a layer of mulch - very poor conductors of heat. Lying deep below the soil and subsoil layers give very slowly accumulated over the summer heat. Thus, it becomes clear that the toads, dig deep into the ground, hibernating bear not undercooling. In this case, it must be said that the toads, as is shown by experiments Kalabuhova, cooling the body can withstand up to -0,75 °.