Schemes of mousetraps

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Mousetraps and rat-traps

How to catch a mouse? How to catch a rat?

A trap for field vole is a tapered tube with a plug at the wide end and the entrance at the narrow end. Fig. 7). The end of the cylindrical spring sets against the entrance from the inside. The mouse, attracted by the smell of the bait runs into the trap and moves forward along the spring. Eventually, the spring sails under the weight of the animal and the mouse when gets out of it finds itself trapped. The spring straightens again, rises up and cuts the way to the exit.

	The expression «drive into a bottle» was taken literally by one of the authors. His mousetrap differs from ordinary bottle only by the presence of the side flange on the bottom with the single-acting door. Fig. 8). The mouse is taken by removing the cork.
	Fig. 9). Young tree-plantings especially sensitive to the invasions of rodents. Bury half meter height cells with latticed side walls and one-way entrances in the ground. Each cell has the bait inside. No lid. The cell is like a runway. Different animals penetrate inside, attracted by the smell of the bait. The cells sort animals. The thing is that, for example, the mice which do not cause harm to the young shoots get out of the runway by jumping on its walls. Rodents, voles in particular, which gnaw round the bark of trees, due to the peculiarities of their body, can not overcome the barrier and remain inside. There they are caught by the predators.
	The single-acting doors function on the base of a fishhook - easy to swallow, but try to break away! This idea is shown on the Fig. 10) its author suggests dropping the rope with the weight on its end and several fishhooks in the rat's hole. The rat will be caught on the fishhook and won't release.
	We consider the trap on the Fig. 11) to be he most successful. It is a thin metal tube with a slit. The hooks fused together inside along the perimeter. The points of the hooks turned inwards and deflected at the angle of 10-15 degrees. What is the slit for? With its help the tube is squeezed and placed inside the hole. When a rodent is caught, the tube is extracted by the string.
	The trap on the Fig. 12) is based on the other principle. Roughly speaking, it's a bucket with vertical side walls with cuts pointing to the downwards. The rodent smells the bait, tries to get inside and its head sticks in the cut of the bucket. No escape.

images P.Kozlova

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