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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 ago.
Modern birds are 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. All living species of birds have wings—the now extinct flightless moa of New Zealand were the only exception. Wings are evolved forelimbs, and most bird species can fly. Flightless birds include ratites, penguins, and a number of diverse endemic island species. Birds also have unique digestive and respiratory systems that are highly adapted for flight. Some birds, especially corvids and parrots, are among the most intelligent animal species; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.
Many species undertake long distance annual migrations, and many more perform shorter irregular movements. Birds are social; they communicate using visual signals and through calls and songs, and participate in social behaviours, including cooperative breeding and hunting, flocking, and mobbing of predators. The vast majority of bird species are socially monogamous, usually for one breeding season at a time, sometimes for years, but rarely for life. Other species have polygynous ("many females") or, rarely, polyandrous ("many males") breeding systems. Eggs are usually laid in a nest and incubated by the parents. Most birds have an extended period of parental care after hatching.
Many species are of economic importance, mostly as sources of food acquired through hunting or farming. Some species, particularly songbirds and parrots, are popular as pets. Other uses include the harvesting of guano (droppings) for use as a fertiliser. Birds figure prominently in all aspects of human culture from religion to poetry to popular music. About 120–130 species have become extinct as a result of human activity since the 17th century, and hundreds more before then. Currently about 1,200 species of birds are threatened with extinction by human activities, though efforts are underway to protect them.



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:iconwldragon:
WLDragon Featured By Owner Jul 22, 2013  Student Traditional Artist
poli kalo . bravo sou file.
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jul 22, 2013  Professional Interface Designer
euxaristw na sai kala!
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:iconwldragon:
WLDragon Featured By Owner Jul 22, 2013  Student Traditional Artist
tipota :)
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jul 22, 2013  Professional Interface Designer
:)
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:iconchryssalis:
chryssalis Featured By Owner Jul 16, 2013
Your wonderful work is featured here  chryssalis.deviantart.com/jour... :huggle::love:
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jul 16, 2013  Professional Interface Designer
timh m :hug: :)
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:iconkevrekidis:
Kevrekidis Featured By Owner Jul 9, 2013  Hobbyist Photographer
Nice captures!!!!!
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jul 9, 2013  Professional Interface Designer
thanks :D
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:iconchris-lamprianidis:
Chris-Lamprianidis Featured By Owner Jul 1, 2013
Είναι καταπληκτικές Γιάννη. Σ' ευχαριστώ.
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jul 2, 2013  Professional Interface Designer
tipota na sai kala :)
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:iconshades-of-lethe:
Shades-Of-Lethe Featured By Owner Jun 30, 2013  Hobbyist Digital Artist
Panemorfh!!! Polu idiaiterh fwtografia! Teleia douleia!!! :hug:
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jul 1, 2013  Professional Interface Designer
euxaristw me duskolepse ligo alla ok :)
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:iconhmissxx:
HMissXX Featured By Owner Jun 28, 2013
Great!!! :clap:!!!
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 28, 2013  Professional Interface Designer
xaxax thanks mia fwto meta apo kairo :D
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:iconhmissxx:
HMissXX Featured By Owner Jun 28, 2013
Αλλά τι φωτο!!!!!!!!!!!!!!!!!!!:wow:!!!!!!!!!!!!!!!
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 28, 2013  Professional Interface Designer
xairomai pou sou aresei :D h alhtheia einai oti hmoun anapofasistws poia apo ts 2 na perasw kai ts perasa san mia sunexeia ts diadikasias ts trofhs :D
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:iconhmissxx:
HMissXX Featured By Owner Jun 28, 2013
Δικαια ήσουν αναποφάσιστος, είναι απίθανες και οι δυο τους! Η τελική ιδέα είναι πανέξυπνη! Μπράβο, Γιάννο μου!!!
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 28, 2013  Professional Interface Designer
euxaristw xairomai pou s aresei :dance:
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:iconhmissxx:
HMissXX Featured By Owner Jun 29, 2013
Να είσαι πάντα καλά! :hug:
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jul 1, 2013  Professional Interface Designer
:hug: :)
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(1 Reply)
:iconbadnan:
badnan Featured By Owner Jun 26, 2013   Photographer
A poulaki mou :P
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 26, 2013  Professional Interface Designer
Xaaxaxaxa eides gia na mhn les oti hrtha sto nhsi kai tempeliazw :-P
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:icony4why:
Y4why Featured By Owner Jun 25, 2013
τελεια!
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 25, 2013  Professional Interface Designer
euxaristw na sai kala :)
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:iconchryssalis:
chryssalis Featured By Owner Jun 25, 2013
Fantastiko capture!!!:clap::love:
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 25, 2013  Professional Interface Designer
xairomai pou sou aresei :dance: :D
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:iconmarkus43:
Markus43 Featured By Owner Jun 24, 2013  Hobbyist General Artist
Well done!
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
thanks :)
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:iconfrenchfox:
frenchfox Featured By Owner Jun 24, 2013
Beautiful scene of life ! :clap:
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
thanks :)
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:iconkokinomala:
kokinomala Featured By Owner Jun 24, 2013
:clap:!!
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
:hug: :D
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:iconkokinomala:
kokinomala Featured By Owner Jun 24, 2013
:hug:
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
:D
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:icongreek-pan:
Greek-pan Featured By Owner Jun 24, 2013
Μπραβο Γιαννη -εξαιρετικη δουλεια και πολυ ομορφες φωτο.
Μου αρεσει πολυ η απουσια της ευκρινειας στη συγκεκριμενη περιπτωση.
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
euxaristw polu pano gia to sxolio :)
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:icongreek-pan:
Greek-pan Featured By Owner Jun 24, 2013
Νασαι καλα.
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
:)
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:iconowel:
owel Featured By Owner Jun 24, 2013
wow kataplhktikh johnjohn :clap:
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
thanks !! :D mia wra kathomoun gia na thn petuxw tha mporouse kai kalhtera alla den eixa allh upomonh :P
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:iconowel:
owel Featured By Owner Jun 24, 2013
xaxaxa pws den se phre o upnos kai na xaseis thn stigmh xaxaxa:p
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
tha se gelasw :)
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:iconowel:
owel Featured By Owner Jun 25, 2013
:p pantws aksize h anamonh ;)
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 25, 2013  Professional Interface Designer
ontwss :D
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:icondreamer113:
Dreamer113 Featured By Owner Jun 23, 2013  Hobbyist General Artist
This is a gorgeous shot! You are an amazing shot :)
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
thanks :)
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:iconigngiannioglou17:
IgnGiannioglou17 Featured By Owner Jun 23, 2013  Hobbyist Photographer
gamates foto!! :D bravo!! :clap:
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 23, 2013  Professional Interface Designer
thanks :D
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:iconigngiannioglou17:
IgnGiannioglou17 Featured By Owner Jun 24, 2013  Hobbyist Photographer
:D
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:iconjohngiannis27:
johngiannis27 Featured By Owner Jun 24, 2013  Professional Interface Designer
:)
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Details

Submitted on
June 23, 2013
Image Size
169 KB
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1000×1437
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1,281
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83 (who?)
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Camera Data

Make
NIKON CORPORATION
Model
NIKON D3100
Shutter Speed
1/200 second
Aperture
F/5.6
Focal Length
55 mm
ISO Speed
3200
Date Taken
Jun 22, 2013, 2:05:55 AM
Software
Adobe Photoshop CS5.1 Windows
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