BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
How do owls hunt? Detailed answer Directory / Big encyclopedia. Questions for quiz and self-education Did you know? How do owls hunt? Owls are birds of prey. They are the best hunters of all predators. In an owl, everything seems to be created specifically for hunting. The owl has powerful, needle-sharp claws that pierce the victim like the teeth of a trap. The claws are connected into one paw, which the owl can turn in any direction. In most species of owls, large eyes see better in the evening or at night in the moonlight than in the daytime. Owls have more sensitive ears than other birds. Their ears can be of various shapes, they are hidden on the head under feathers. The owl has soft, down-lined wing feathers. This allows you to make the flight of an owl almost silent, which is very helpful when hunting. Owls usually hunt at sunset, at dusk or in moonlight. They hear mouse rustling for many meters. When an owl listens from its hunting perch, it pushes back the feathers and skin covering its ears. In this case, an auricle is formed, which perceives the slightest sound. When the owl locates the prey by hearing, it suddenly and accurately attacks and sticks sharp claws. Owls feed on mammals such as mice, squirrels, and rabbits. They also eat lizards, frogs, birds and even fish. Owls catch mice better than any human-made mousetrap. Author: Likum A. Random interesting fact from the Great Encyclopedia: What is silver? Silver has been mined since ancient times. In Europe, the state of kings was judged by the amount of silver. When the silver mines in Spain were depleted, the king of Spain was overjoyed at the news of the discovery of America: after all, this meant gaining access to the richest silver ores of Mexico and Peru. For 250 years, the Spanish kings annually received $4 million worth of silver from the Potosí mine in Peru! During the California gold rush, miners cursed the "black earth" that accompanied the gold-bearing rock. And only a chance helped to determine that this is an ore containing silver! Silver is one of the most common metals. Sometimes nuggets of this metal are found, and in Norway a silver nugget weighing three quarters of a ton was once found! But usually it is an ore from which the metal must be extracted. In such an ore, silver together with sulfur forms silver sulfide or is included in other sulfides such as copper sulfide, lead sulfide and arsenic sulfide. In the US, silver is usually mined in combination with lead. Since silver forms compounds with various metals, there are many ways to separate silver from its by-products. Currently, almost 850 kilograms of pure silver are mined all over the world per year. The main producers are Mexico, USA and Canada. Silver is a soft metal, so it is often used in combination with other metals. Silver coins, for example, contain 90% silver and 10% copper. The composition, intended for jewelry, jewelry and cutlery, contains 92,5% silver and 7,5% copper. The definition of "sterling" silver has an interesting history. It comes from the Easterling family who lived in Northern Germany. This family was known for their honesty, so King John of England commissioned them in 1215 to make metal coins for England. The task was carried out so well that even today their name means the highest degree of reliability. Sterling silver has a special marking, the word "sterling" or a specific mark, depending on the country. Pure silver does not darken in air. Darkening indicates the presence of sulfur in the air - for example, with air pollution or if there are oil fields nearby. After gold, silver is the easiest metal to work with. Thirty grams of silver can be used to draw a wire over 50 km long. It is also the best known conductor of heat and electricity.
Test your knowledge! Did you know... ▪ Why do animals go into hibernation? ▪ How did imperfect knowledge of English help discover a sugar substitute? See other articles Section Big encyclopedia. Questions for quiz and self-education. Read and write useful comments on this article. Latest news of science and technology, new electronics: Machine for thinning flowers in gardens
02.05.2024 Advanced Infrared Microscope
02.05.2024 Air trap for insects
01.05.2024
Other interesting news: ▪ Organic CMOS image sensor with electronic sensitivity control in NIR ▪ An alternative to SMS messages will appear in Europe ▪ Acoustic control in the nanoworld ▪ Toshiba N300 Pro and X300 Pro hard drives News feed of science and technology, new electronics
Interesting materials of the Free Technical Library: ▪ section of the site Audio and video surveillance. Selection of articles ▪ article Sermjazhnaya truth. Popular expression ▪ article Where were experiments on crossing chimpanzees and humans carried out? Detailed answer ▪ article Car Mouse. Personal transport ▪ Article Perfume. Simple recipes and tips
Leave your comment on this article: All languages of this page Home page | Library | Articles | Website map | Site Reviews www.diagram.com.ua |