How do fiddler crabs deceive other males of their species? Detailed answer

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How do fiddler crabs deceive other males of their species? Detailed answer

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How do fiddler crabs deceive other males of their species?

Male fiddler crabs have one claw much larger than the other. These crabs got their name because, as it were, they call females to themselves by moving this claw. Males of one of the types of attracting crab Uca mjoebergi went further - if they lose a large claw in a fight with another male, then they grow it even larger, although much weaker. However, for females, its appearance becomes more significant, and other males are afraid to engage in battle with the owner of such a claw.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Why do hailstones have different sizes?

In some places where thunderstorms occur quite often, one thunderstorm in eight hundred is accompanied by hail the size of a walnut, and one thunderstorm in five thousand carries hail the size of a tennis ball. And you probably know from your own experience that hailstones can have other sizes. Hail usually falls in warm weather and is usually accompanied by thunder, lightning and rain.

Hail is formed when raindrops pass through a layer of cold air on their way to the ground and freeze. Individual raindrops form very small hailstones. Larger hailstones appear the same way, but when small hailstones fall and encounter strong updrafts along the way, they can rise to the point where raindrops form. More drops stick to the hailstone, and when it again flies through the cold layers, the water envelops it and freezes, thus increasing the size of the hailstone.

The hailstone can rise and fall repeatedly until it builds up a number of layers that increase its weight so much that it is able to overcome the force of the rising air currents and falls to the ground. Thus, hailstones with a diameter of 8-10 centimeters and a weight of up to 0,5 kg appear. Snow also freezes around hailstones when they are brought into areas where it forms. Therefore, hail often consists of layers of snow and ice.

The hail causes great damage every year. It destroys crops such as rye, wheat, cotton and tobacco. It can knock leaves off trees, shatter glass in windows, and even injure poultry and animals!

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