- published: 20 Jan 2015
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Birds (class Aves) are a group of endothermic vertebrates, characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich. They rank as the class of tetrapods with the most living species, at approximately ten thousand, with more than half of these being passerines, sometimes known as perching birds or, less accurately, as songbirds.
The fossil record indicates that birds are the last surviving dinosaurs, having evolved from feathered ancestors within the theropod group of saurischian dinosaurs. True birds first appeared during the Cretaceous period, around 100 million years ago, and the last common ancestor is estimated to have lived about 95 million years ago. DNA-based evidence finds that birds radiated extensively around the time of the Cretaceous–Paleogene extinction event that killed off the non-avian dinosaurs. Birds in South America survived this event and then migrated to other parts of the world via multiple land bridges while diversifying during periods of global cooling. Primitive bird-like "stem-birds" that lie outside class Aves proper, in the group Avialae, have been found dating back to the mid-Jurassic period. Many of these early stem-birds, such as Archaeopteryx, were not yet capable of fully powered flight, and many retained primitive characteristics like toothy jaws in place of beaks and long bony tails.
The domestic cat (Felis catus or Felis silvestris catus) is a small, typically furry, domesticated, and carnivorous mammal. They are often called house cats when kept as indoor pets or simply cats when there is no need to distinguish them from other felids and felines. Cats are often valued by humans for companionship and for their ability to hunt vermin. There are more than 70 cat breeds; different associations proclaim different numbers according to their standards. The International Progressive Cat Breeders Alliance (IPCBA) recognizes 73 cat breeds while TICA (The International Cat Association) recognizes 58, CFA (The Cat Fanciers' Association) recognizes 44 and Federation International Feline (FIFE) recognizes 43.
Cats are similar in anatomy to the other felids, with a strong, flexible body, quick reflexes, sharp retractable claws, and teeth adapted to killing small prey. Cat senses fit a crepuscular and predatory ecological niche. Cats can hear sounds too faint or too high in frequency for human ears, such as those made by mice and other small animals. They can see in near darkness. Like most other mammals, cats have poorer color vision and a better sense of smell than humans. Cats, despite being solitary hunters, are a social species and cat communication includes the use of a variety of vocalizations (mewing, purring, trilling, hissing, growling, and grunting), as well as cat pheromones and types of cat-specific body language.
National Geographic or NatGeo may refer to:
The Ultimate Videos of Birds for Cats To Watch The birds in the video are - First Clip - Eurasian Jays with a Magpie sneaking in towards the end. 2:15 - Nuthatches, Coal Tits and Blue Tits. 3:19 - Crow, Coal Tit, Nuthatch and Chaffinch. 4:27 - European Goldfinches. 8:14 - Great Tits, Nuthatches, Coal Tits, Robins. 11:47 - Nuthatch, Robin, Blue Tit, Great Tit, Coal Tit. 13:31 - Robins. 15:31 - Female Blackbird, Coal Tit, Great Tit, Blue Tit and Nuthatch. Video Produced by Paul Dinning - Wildlife in Cornwall
Parrots: Majestic Birds (Nature Documentary) NATURE tracks down the cockiest characters in the land down under in Parrots in the Land of Oz. We keep them in cages in our homes, but in their natural state they are independent birds who can seek out water over hundreds of miles through pure instinct. We feed them seed from a pet store, but they can find food in a wide variety of habitats. We give them plastic toys and mirrors to play with when in fact in the wild some have figured out how to use tools to communicate and attract mates. For tens of millions of years, parrots have survived and thrived in Australia even as the continent underwent dramatic changes, including some brought about by man. Though some, like the golden-shouldered Parrot are threatened, these tough Aussies have adapt...
19 of the funniest birds you'll see this week. The Pet Collective is home to the top trending clips, most entertaining memes, and funniest animal videos online. Simply put, we think animals are the best ever. If you agree, let’s make it YouTube official right here, right meow: Subscribe to The Pet Collective: http://bit.ly/tpcsub Website: http://www.thepetcollective.tv Facebook: http://www.facebook.com/thepetcollective Instagram: http://www.instagram.com/petcollectivetv Pinterest: http://pinterest.com/petcollectivetv/ Want to submit your own awesome pet vid to us? There's a link for that! jukinmedia.com/video-submissions Watch the Originals: https://www.youtube.com/watch?v=6_-4KArFR08 https://www.youtube.com/watch?v=t1wAjcWHkDY https://www.youtube.com/watch?v=pLJegq01S6A https://www.y...
Explore more: http://www.birdsofparadiseproject.org The Birds-of-Paradise Project reveals the astounding beauty of 39 of the most exquisitely specialized animals on earth. After 8 years and 18 expeditions to New Guinea, Australia, and nearby islands, Cornell Lab scientist Ed Scholes and National Geographic photojournalist Tim Laman succeeded in capturing images of all 39 species in the bird-of-paradise family for the first time ever. This trailer gives a sense of their monumental undertaking and the spectacular footage that resulted. Filmed by Tim Laman, Ed Scholes, and Eric Liner. Also be on the lookout for the Cornell Lab's and National Geographic's gorgeous coffee-table book (http://amzn.to/RYb7IL), a major exhibit at the National Geographic Museum (http://ngmuseum.org/bop), a TV do...
Videos for Cats to Watch : Garden Birds at The Tiny Bench Birds in the video : Bullfinch, Goldfinch, Robin, Blackbird, Blue Tit, Great Tit, House Sparrows. Video Produced by Paul Dinning - Wildlife in Cornwall Filmed in October 2016
Birds Chirping, Singing and Being Awesome : Longest Bird Video on Youtube - Almost 10 HOURS of Relaxing Bird Song and Sounds for Cats to Listen To and Sleep Video Produced by Paul Dinning - Wildlife in Cornwall
Birds in The Morning : Chirping and Wings Fluttering : Videos for Cats and People to Watch in Autumn - Video Produced by Paul Dinning - Wildlife in Cornwall Filmed Filmed on October 13th 2016
Birds Singing and Chirping : Videos and Bird Sounds for Cats to Watch and Listen To http://www.wildlifeincornwall.com/ Filmed On October 5th 2016 Video Produced by Paul Dinning - Wildlife in Cornwall
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Beautiful Birds / Parrot Confidential (National Geographic) National Geographic Parrots Majestic Birds Documentary Parrots Majestic Birds (Nature Documentary) Most Beatiful Colorful Birds National Geographic Parrots Majestic Birds Parrots Majestic Birds Documentary Tropical Birds Beautiful National Geographic Wild Birds National Geographic colorful Birds National Geographic Talking Birds National Geographic Birds Parrots Majestic Birds National Geographic Wild Birds Birds Documentary Parrots Majestic Birds of the World Beautiful Exotic Birds with Relaxing Bird Sounds Parrots Majestic Birds Beautiful Bird of Paradise Mating Dance Birds of Paradise
An educational and fun program ~ Full Movie Angry Birds and Bad Piggies☺ Angry Birds Toon on Crtani Filmici channel / Cartoon Networkღ
Birds Chirping | Love Birds Singing - KICAU MANIA
Parrots Majestic Birds (Tropical Birds) Parrots Majestic Birds Tropical Birds Parrots Majestic Birds Documentary Most Beatiful Colorful Birds Birds Documentary Tropical Birds Parrots Majestic Birds Parrots Majestic Birds Documentary Tropical Birds Beautiful Tropical Birds Wild Birds Tropical Birds colorful Birds Tropical Birds Talking Birds Tropical Birds Birds Parrots Majestic Birds Tropical Birds Wild Birds Birds of Paradise of the World Tropical Birds Beautiful Exotic Birds with Relaxing Bird Sounds Beautiful Bird of Paradise Mating Dance Birds of Paradise
Birds, they're walking all around
Birds, they're making little sounds
Have you seen any birds today
I will blow those birds away
Birds, birds, birds, birds
Worms, they're sneaking underground
Worms, they're making tiny sounds
Dirt, is what they eat
Rocks and stones make a worm complete
Worms, worms, worms, worms
Birds, they're looking pretty cute
Birds, I see 'em, I shoot
Have you seen any birds today
I will blow those birds away
Birds, birds, birds, birds