What is Bird?
{{good}} {{Automatic taxobox | name = Birds | fossil_range = [[Upper Cretaceous]]-[[Holocene|Present]] {{fossil range|72|0}} <imagemap> File:Bird Diversity 2013.png|300px rect 0 0 333 232 [[Red-crested turaco]] rect 0 232 333 470 [[Steller's sea eagle]] rect 0 696 333 470 [[Rock dove]] rect 0 928 333 700 [[Southern cassowary]] rect 0 1160 333 930 [[Gentoo penguin]] rect 0 1392 333 1160 [[Bar-throated minla]] rect 666 0 333 232 [[shoebill]] rect 666 232 333 470 [[grey crowned crane]] rect 666 696 333 470 [[Anna's hummingbird]] rect 666 928 333 700 [[rainbow lorikeet]] rect 666 1160 333 930 [[grey heron]] rect 666 1392 333 1160 [[Eurasian eagle-owl]] rect 999 0 333 232 [[white-tailed tropicbird]] rect 999 232 333 470 [[Indian peafowl]] rect 999 696 333 470 [[Atlantic puffin]] rect 999 928 333 700 [[American flamingo]] rect 999 1160 333 930 [[blue-footed booby]] rect 999 1392 333 1160 [[keel-billed toucan]] </imagemap> | image_caption = Examples of various avian orders. Row 1: [[Red-crested turaco]], [[shoebill]], [[white-tailed tropicbird]]<br />Row 2: [[Steller's sea eagle]], [[grey crowned crane]], [[common peafowl]]<br />Row 3: [[Great hornbill]], [[Anna's hummingbird]], [[Atlantic puffin]]<br />Row 4: [[Southern cassowary]], [[rainbow lorikeet]], [[American flamingo]]<br />Row 5: [[Gentoo penguin]], [[grey heron]], [[blue-footed booby]]<br />Row 6: [[Bar-throated minla]], [[Eurasian eagle-owl]], [[keel-billed toucan]] | taxon = Aves | authority = [[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]]<ref name=brands>{{cite web | url=http://taxonomicon.taxonomy.nl/TaxonTree.aspx?id=80129&tree=0.1 | title=Systema Naturae 2000 / Classification, Class Aves | accessdate=11 June 2012 | last=Brands | first=Sheila | date=14 August 2008 | work=Project: The Taxonomicon | archive-date=5 May 2008 | archive-url=https://web.archive.org/web/20080505214909/http://taxonomicon.taxonomy.nl/TaxonTree.aspx?id=80129&tree=0.1 | url-status=live }}</ref> | subdivision_ranks = Living [[Order (biology)|Orders]] | subdivis