Knowledge treasure- zoology
*Dance of the honey bees
A worker honeybee lets the other workers know about a new source of food it has discovered by performing a dance on the surface of comb to show the others how far and in what direction to go to find the new food source. The speed of the dance and its length can communicate the relative ease or difficulty of the flight: uphill or against the wind takes more energy.
If the amount of food to be found there is great, the dance lasts longer and is more enthusiastic. Therefore, it arouses a greater number of bees.
*Flying fish
Flying fish files through the air with two wings –like fins know as pectoral fins.
The flying fish usually leaves the water when it is pursed by its enemies like sharks, tuna, porpoises and dolphins.
To escape them, the flying fish first increases its swimming speed keeping its pectoral fins folded. When it is swimming fast enough, it swoops up out of the water spreading its fins soars out of its enemies’ reach. The flying fish can stay aloft from 2 to 15 seconds. In the air it can span from 45 to 2000 yards.
*Polar bear- champion swimmer
The polar bear is a swift and wide –ranging traveler. It often roams thousands of kilometers a year.
It swims very well and is often found many miles from land or ice packs. scientists have tracked a polar bear called `Skadi’ taking a 24 hours long swim in which it covered 74 kilometers giving an average speed of about 3 kilometers-about as fast as person walking.
*Hide and seek
Trapdoor spiders are tricky creatures. After they have made a safe and secure burrow they construct a trapdoor at the entrance. They lie wait behind the trapdoor, ready to leap upon any unsuspecting insects that may crawl by. Sensitive hairs on its legs feel the vibrations of approaching prey.
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