What is Blue tit?
{{Taxobox | name = Blue tit | status = LC | status_system = iucn3.1 | status_ref = <ref name= IUCN>{{IUCN2011.1 |assessors=BirdLife International |year=2009 |id=147892 |title=Parus caeruleus |downloaded=13 August 2011}}</ref> | image = Лазоревка (Cyanistes caeruleus), Битцевский лес.jpg | image_width = | image2 = Blue Tit (Cyanistes caeruleus) (W1CDR0001535 BD30).ogg | image2_caption = Chirping sound | regnum = [[Animal]]ia | phylum = [[Chordate|Chordata]] | classis = [[Bird|Aves]] | ordo = [[passerine|Passeriformes]] | familia = [[tit (bird)|Paridae]] | genus = ''[[Cyanistes]]'' | binomial = ''Cyanistes caeruleus'' | binomial_authority = ([[Carl Linnaeus|Linnaeus]], [[Systema Naturae|1758]]) | range_map = CyanistesCaeruleusDistribution.png }} [[File:Cyanistes caeruleus MHNT.ZOO.2010.11.181.18.jpg|thumb|''Cyanistes caeruleus'']] The '''blue tit''' (''Cyanistes caeruleus'') is a [[passerine]] [[songbird]] in the [[family (biology)|family]] [[Paridae]]. It is 10.5 to 12&nbsp;cm (4.2 to 4.8&nbsp;inches) long. The blue tit is a widespread and common resident breeder. It lives throughout temperate and subarctic [[Europe]] and western [[Asia]] in [[deciduous]] or mixed [[woodland]]s. It is a resident bird; most do not [[migration|migrate]]. ==Behaviour== Blue and [[great tit]]s form mixed winter flocks, and the former are perhaps the better [[Gymnastics|gymnast]]s on the slender twigs. A blue tit will often ascend a trunk in short jerky hops, imitating a [[treecreeper]]. As a rule the bird [[roost]]s in [[ivy]] or [[evergreen]]s, but in hard weather will [[shelter]] in a hole. Blue tits are very agile and can hang from almost anywhere. The blue tit has an average [[life expectancy]] of 1.5 years [http://www.garden-birds.co.uk/information/lifespan.htm] ===Diet=== [[File:Cyanistes caeruleus -garden bird feeder-8.ogv|right|thumb|thumbtime=4.5|Eating peanuts from a garden bird feeder]] The blue tit is a destroyer of [[pest]]s. It is fond of young buds of various trees, and may pull them to bits in the hope of findi