Bird
Birds (class Aves) are feathered, winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. With around 10,000 living species, they are the most speciose class of tetrapod vertebrates. All present species belong to the subclass Neornithes, and inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from the 5 cm (2 in) Bee Hummingbird to the 2.75 m (9 ft) Ostrich. The fossil record indicates that birds emerged within theropod dinosaurs during the Jurassic period, around 160 million years (Ma) ago. Paleontologists regard birds as the only clade of dinosaurs to have survived the Cretaceous–Paleogene extinction event 65.5 Ma (million years) ago.
Read more about Bird.
Famous quotes containing the word bird:
“Some say that ever ‘gainst that season comes
Wherein our Saviour’s birth is celebrated,
This bird of dawning singeth all night long,
And then they say no spirit dare stir abroad,
The nights are wholesome, then no planets strike,
No fairy takes, nor witch hath power to charm,
So hallowed, and so gracious, is that time.”
—William Shakespeare (1564–1616)
“but as an Eagle
His cloudless thunderbolted on thir heads.
So vertue giv’n for lost,
Deprest, and overthrown, as seem’d,
Like that self-begott’n bird
In the Arabian woods embost,
That no second knows nor third,
And lay e’re while a Holocaust,
From out her ashie womb now teem’d
Revives, reflourishes, then vigorous most
When most unactive deem’d,
And though her body die, her fame survives,
A secular bird ages of lives.”
—John Milton (1608–1674)
“The skreak and skritter of evening gone
And grackles gone and sorrows of the sun,
The sorrows of sun, too, gone . . . the moon and moon,
The yellow moon of words about the nightingale
In measureless measures, not a bird for me....”
—Wallace Stevens (1879–1955)