bird

Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised 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 (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) ostrich. There are about ten thousand living species, more than half of which are passerine, or "perching" birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming.
Birds are feathered theropod dinosaurs and constitute the only known living dinosaurs. Likewise, birds are considered reptiles in the modern cladistic sense of the term, and their closest living relatives are the crocodilians. Birds are descendants of the primitive avialans (whose members include Archaeopteryx) which first appeared about 160 million years ago (mya) in China. According to DNA evidence, modern birds (Neornithes) evolved in the Middle to Late Cretaceous, and diversified dramatically around the time of the Cretaceous–Paleogene extinction event 66 mya, which killed off the pterosaurs and all non-avian dinosaurs.Many social species pass on knowledge across generations, which is considered a form of culture. Birds are social, communicating with visual signals, calls, and songs, and participating in such behaviours as cooperative breeding and hunting, flocking, and mobbing of predators. The vast majority of bird species are socially (but not necessarily sexually) monogamous, usually for one breeding season at a time, sometimes for years, and rarely for life. Other species have breeding systems that are polygynous (one male with many females) or, rarely, polyandrous (one female with many males). Birds produce offspring by laying eggs which are fertilised through sexual reproduction. They are usually laid in a nest and incubated by the parents. Most birds have an extended period of parental care after hatching.
Many species of birds are economically important as food for human consumption and raw material in manufacturing, with domesticated and undomesticated birds being important sources of eggs, meat, and feathers. Songbirds, parrots, and other species are popular as pets. Guano (bird excrement) is harvested for use as a fertiliser. Birds figure throughout human culture. About 120 to 130 species have become extinct due to human activity since the 17th century, and hundreds more before then. Human activity threatens about 1,200 bird species with extinction, though efforts are underway to protect them. Recreational birdwatching is an important part of the ecotourism industry.

You do not have permission to view the full content of this post. Log in or register now.
  1. D

    Referral Crazy bird

    CrazyBird is the fastest app to make money so far. If you don’t come, you will lose money. Enter id78015268 and get cash immediately ₱75. Crazy Bird Try nyo na mga idol medyo matagal na rin 'to. Nakaka enjoy din laruin wala naman mawawala eh. Hehe Pwedeng gcash or lazada.
  2. Z

    Referral Crazy Bird wí†hdráw via gcash/lazada .

    How? CrazyBird, the super fast money-making app, have you not installed it yet? Just enter the invitation id 49758037 to receive ₱75. Crazy Bird Referral code : 49758037 may 75 pesos ka na pwedi i wí†hdráw ka agad❤️ Reach level 200 kikita kana agad
  3. R

    Referral New Earning Apps(Crazy Bird)

    CrazyBird, the super fast money-making app, have you not installed it yet? Just enter the invitation id 64686885 to receive ₱75.https://d20cqguc0t8bvd.cloudfront.net/cb/v1/index_5.html?id=64686885 Use this invitation code "64686885" to claim free 75Pesos!!!
  4. R

    Referral NEW LEGIT EARNING APPS CRAZY BIRD!!!

    Ang bagong app na ito, ang CrazyBird, ay kumikita nang napakabilis. Ilagay ang invitation id 64686885 at maaari kang makakuha ng reward na ₱75. Crazy Bird
  5. R

    Referral Crazy Bird

    Kung gusto mong kumita, i-install ang CrazyBird. Kapag mas maaga kang dumating, mas malaki ang kikitain mo. Ilagay ang id na ito64686885 para makatanggap ng mga benepisyo ₱75. https://d20cqguc0t8bvd.cloudfront.net/cb/v1/index_5.html?id=64686885
  6. M

    Referral 2K Gcash/Lazada Crazy Bird - Earning Game App

    Looking for Crazy Dog & Crazy Hero-like games? Well, try this one! I discovered a fun and profitable app called CrazyBird. Come and make money with me. Enter the invitation id 13232428 to get the startup capital ₱75 immediately. Crazy Bird Dont forget to use my referral code to earn extra...
  7. J

    CONFIRMED 100% Persona Journey Airdrop (Early Bird)

    Dito Papaldo Tayo Sure yan! Ang gandang project nito at bagong bago pa lang! Info muna mga Lods: What is Persona Journey? Persona Journey isn’t just another project; it’s a transformative experience. Imagine a cosmic voyage where data meets destiny. At its core, Persona Journey revolves...
  8. K

    IF i were a bird!

  9. E

    Parang iba lasa

  10. 2

    Referral Mga Early bird tayo dito mga lodi Join na

    Sali lang tayo dito mga lodi mas maaga tayo dito mas papaldo Kaka Join ko lang din gusto ko din i-share sama sama tayo Ang goal is to get followers and boost ng rank mo sa site napaka simple bind mo lang ang X or Twitter account. As of now 80K na ang sumali dito Join Here
  11. N

    Referral Piratos (Watch Road Map) Early Bird Perks!!

    Piratos is a hybrid multiplayer game that combines the Free-to-Play and Play-to-Earn models. You can receive free heroes to play casually. Better yet, acquire NFTs to start earning and maximize your profits. You can play by yourself or with friends. The strongest bosses are easier to defeat...
  12. C

    Yeah! It's A Mocking Bird

    Oh, yeah.. it is a mocking bird. LOL
  13. T

    Referral Salihan nyo na po ito early bird catches early chest

    EARLY BIRDS SECRET REGISTRATION PAGE
  14. B

    Referral Imaginary ones Free NFT for Early bird.. (Site Fix) see the opensea photo

    EARLY BIRDS SECRET REGISTRATION PAGE Let's go guys.. Nasa opensea na kaya legit. Your'e welcome
  15. H

    Referral Early Bird Airdrop sali agad

    Convival Early Birds OAT NFT Sign up and win rewards! 🎁 Hidden content Complete all simple task and claim. Goodluck guys! My other airdrop/s: Airdrop Email lang kailangan join na Airdrop Early Users will be Rewarded
  16. S

    Bird

    Most animals: teaches their kids how to walk gently Birds:
  17. B

    Trivia There's a bird that has "evolved" back into existence twice

    There's a bird that has "evolved" back into existence twice The Aldabra white-throated rail may not be a very well known bird, but it's certainly a remarkable one. The flightless creature first found itself in trouble around 136,000 years ago when it went extinct—something it's done twice...
  18. B

    Trivia Most Common Bird on Earth

    The red-billed quelea is the most common bird on Earth There may not be any red-billed queleas in your neighborhood, but that's not because there isn't an abundance of them. These birds, which live in sub-Saharan Africa, are considered agricultural pests because their massive flocks can...
  19. C

    Help Peer 2 VPS via Bird and gretap tunneling

    I have 2 VPS. VPS1 with supported bgp session on its provider and VPS2 without bgp from its provider. How can I give ipv6 transit to my VPS2 from VPS1 by peering them using bird and gretap tunnel. Please answer with full sample config.
  20. P

    PlayToEarn PARANG FLAPPY BIRD BAGONG LABAS LANG 0.35$ PWEDE MO NG I wí†hdráw.

    Update ko kayo pag nakapag wí†hdráw ako. wí†hdráwal Method °Gcash °Paypal kung gusto nyo din download nyo nalang gamit refferal link ko https://fhtu6.app.link/zdsyYwFpWxb
  21. T

    Bird

    What's the difference between kinky and perverted? . . Kinky is when you tickle your girlfriend with a feather, . . . Perverted is when you use the whole bird.
  22. B

    Help Bird flu

    May bird flu po ba talaga ngayon kase nagpadala po yung mama ko ng native na manok at atchara pero sabi daw po ng driver hinarang daw po kase may bird flu
  23. P

    Looking For LF this bird.

    Hanap ako gantong ibong Palawan Mynah 🥲
  24. W

    Help Sa mga meron alagang ibon dyan, patingin naman ng bird feeder niyo

    Balak ko sana mag DIY ng automatic bird feeder..kailangan ko lng makita kung ano ginawa niyo , yung hindi mo na kailangan magpalit ng pellets every week dahil sigurado hindi niya madudumihan. Salamat
  25. K

    Closed Flappy Bird App

    Kung hnap niyo ay isang simpleng laro ngunit overrated, dito na kayo sa Flappy Bird. Ipopost ko ngayon ito sa PH CORNER kasi wala na tayong access sa app na ito sa Playstore dahil sa report na dahil sa game na ito nagagwang sirain ng ng mga users ang kanilang phone.
  26. M

    Closed Bird baks

    medyo ok din panoorin nyo sa jejflix dun sa YT
  27. G

    Closed Nakakita ka na ng ibon na ang paa ay nasa taas?

    Nakakita ka na nang ibon na ang paa ay nasa itaas?
  28. J

    Closed English speaking si father

    Isang araw nawala ang pet bird ng foreigner na pari, dahil sa sobrang mahal niya ito nanawagan siya sa kanyang misa. Pari: Anyone got a bird? Lahat ng mga lalaki tumayo. Pari: I mean, anyone seen a bird? Lahat ng babae tumayo. Pari: I mean anyone seen my bird? Lahat ng madre tumayo! AGUY!!!
  29. A

    Closed Bird of priest

    Isang araw nawala ang bird ng pari, dahil sa sobrang mahal niya ito nanawagan siya sa kanyang misa. Pari : Anyone got a bird? Lahat ng mga lalaki tumayo. Pari : I mean, anyone seen a bird? Lahat ng babae tumayo. Pari : I mean anyone seen my bird? Lahat ng madre tumayo.
  30. D

    Closed Hi

    ask lang pano mag alaga ng kalapate tnx
  31. E

    Help Game Extension

    Wha about you guys gonna put an Extension were we members can play on it. Like Flappy bird etc. Members hit "LIKE" nalang po kung nagustohan nyo Suggestion ko. Kung may e-susugest kayo o hindi kayo sang-ayun sa Suggestion ko feel free to Reply to this Thread po. :)
Back
Top