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Showing posts from December, 2020

Wonder World of Birds - பறவைகளின் அதிசய உலகம் | ROUNDS TUBE

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Birds are a group of warm-blooded vertebrates characterized by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5.5 cm bee hummingbird to the 2.8 m ostrich. There are about ten thousand living species, more than half of which are passerine, or "perching" birds. 5 Major Characteristics of Birds are as follows: Feathers. Feathers are the defining characteristic of Aves, found on every living species of bird and no other class of animal. ...Wings. All birds have wings, although not all birds fly. ...Beak. All birds have beaks, or bills, made of a bony core surrounded by a thin layer of keratin. ...Eggs. ...Skeleton. Weasels, snakes and foxes all eat birds – and so do other birds, including hawks, owls and gulls. They all have feathers, wings, and a beak, which means they are all birds. Birds share many characteristics with reptil

Life cycle of Butterflies - பட்டாம்பூச்சிகளின் வாழ்க்கை முறை | ROUNDS TUBE

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Butterflies are insects in the macrolepidopteran clade Rhopalocera from the order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. Butterfly fossils date to the Paleocene, about 56 million years ago. Butterflies have the typical four-stage insect life cycle. Winged adults lay eggs on the food plant on which their larvae, known as caterpillars, will feed. The caterpillars grow, sometimes very rapidly, and when fully developed, pupate in a chrysalis. When metamorphosis is complete, the pupal skin splits, the adult insect climbs out, and after its wings have expanded and dried, it flies off. Some butterflies, especially in the tropics, have several generations in a year, while others have a single generation, and a few in cold locations may take several years to pass through their entire life cycle. After mating with a male, the female butterfly must go in search of a plant on which to lay her eggs. ..

Blooming nature of Beautiful Flowers - அழகான மலர்களின் பூக்கும் தன்மை| R...

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A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants. The biological function of a flower is to facilitate reproduction, usually by providing a mechanism for the union of sperm with eggs. A bloom is an individual growth from a plant. Blossom is either all the blooms you see on a tree (cherry blossom, for example) or an individual bloom in the tree. So, blossom is associated with trees. In both cases the unopened is called a bud. The flowering part of a plant or tree that will form the seeds or fruit is called a blossom and synonyms include bloom and flower. A flower is the blossom of any plant, including trees. ... Blossom - is generally the term used for the flowers of fruit bearing trees such as pears, apples, cherries, plums and the like, especially those that flower in spring. The essential parts of a flower can be considered in two parts: the vegetative part, consisting of petals and associated structures in the perianth, and th

Exotic creatures in the underwater world | ROUNDS TUBE

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The underwater environment refers to the region below the surface of, and immersed in, liquid water in a natural or artificial feature (called a body of water), such as an ocean, sea, lake, pond, reservoir, river, canal, or aquifer. Some characteristics of the underwater environment are universal, but many depend on the local situation. Liquid water has been present on Earth for most of the history of the planet. The underwater environment is thought to be the place of the origin of life on Earth, and it remains the ecological region most critical to the support of life and the natural habitat of the majority of living organisms. Several branches of science are dedicated to the study of this environment or specific parts or aspects of it. A number of human activities are conducted in the more accessible parts of the underwater environment. These include research, underwater diving for work or recreation, and underwater warfare with submarines. However, the underwater environment is hos

Habitat and Life style of Horses- குதிரைகளின் வாழ்விடம் மற்றும் வாழ்க்கை...

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The horse is one of two extant subspecies of Equus ferus. It is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature, Eohippus, into the large, single-toed animal of today. Humans began domesticating horses around 4000 BC, and their domestication is believed to have been widespread by 3000 BC. Horses in the subspecies caballus are domesticated, although some domesticated populations live in the wild as feral horses. These feral populations are not true wild horses, as this term is used to describe horses that have never been domesticated, such as the endangered Przewalski's horse, a separate subspecies, and the only remaining true wild horse. There is an extensive, specialized vocabulary used to describe equine-related concepts, covering everything from anatomy to life stages, size, colors, markings, breeds, locomotion, and behavior. Horses are adapted to run, allowing them

4K Video- Tigers in the dense forest - அடர்ந்த காட்டில் புலிகள் | ROUNDS...

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The tiger (Panthera tigris) is the largest extant cat species and a member of the genus Panthera. It is most recognisable for its dark vertical stripes on orange-brown fur with a lighter underside. It is an apex predator, primarily preying on ungulates such as deer and wild boar. It is territorial and generally a solitary but social predator, requiring large contiguous areas of habitat, which support its requirements for prey and rearing of its offspring. Tiger cubs stay with their mother for about two years, before they become independent and leave their mother's home range to establish their own. There are 50 tiger reserves in India which are governed by Project Tiger which is administrated by the National Tiger Conservation Authority. India is home to 80 percent of tigers in the world. The Indian increase played a big role in driving up global populations as well; the number of wild tigers globally rose according to World Wildlife Fund and Global Tiger Forum. The tigers are mai

Body Art - Art of making Tattoos on Body - உடல் கலை - உடலில் பச்சை குத்த...

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Body art is art made on, with, or consisting of, the human body. The most common forms of body art are tattoos and body piercings. Other types include scarification, branding, subdermal implants, scalpelling, shaping (for example tight-lacing of corsets), full body tattoo and body painting. A tattoo is a form of body modification where a design is made by inserting ink, dyes and pigments, either indelible or temporary, into the dermis layer of the skin to change the pigment. The art of making tattoos is tattooing. Tattoos fall into three broad categories: purely decorative (with no specific meaning); symbolic (with a specific meaning pertinent to the wearer); and pictorial (a depiction of a specific person or item). In addition, tattoos can be used for identification such as ear tattoos on livestock as a form of branding. The American Academy of Dermatology distinguishes five types of tattoos: traumatic tattoos, also called "natural tattoos", that result from injuries, especi

Wonderful Venice - The Floating city | ROUNDS TUBE

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Venice is a city in northeastern Italy and the capital of the Veneto region. It is on a group of 118 small islands that are separated by canals and linked by over 400 bridges. The islands are in the shallow Venetian Lagoon, an enclosed bay lying between the mouths of the Po and the Piave rivers (more exactly between the Brenta and the Sile). The city was historically the capital of the Republic of Venice for a millennium and more, from 697 to 1797. It was a major financial and maritime power during the Middle Ages and Renaissance, and a staging area for the Crusades and the Battle of Lepanto, as well as an important center of commerce—especially silk, grain, and spice, and of art from the 13th century to the end of the 17th. The city-state of Venice is considered to have been the first real international financial center, emerging in the 9th century and reaching its greatest prominence in the 14th century. This made Venice a wealthy city throughout most of its history. After the Napole