What is Rook (bird)?
{{about|the bird|the chess piece|Rook (chess)}} {{Taxobox | name = Rook | image = Corvus_frugilegus_2.jpg | image_width = 240px | status = LC | status_system = IUCN3.1 | regnum = [[Animal]]ia | phylum = [[Chordate|Chordata]] | classis = [[bird|Aves]] | ordo = [[passerine|Passeriformes]] | familia = [[Corvidae]] | genus = ''[[Corvus (genus)|Corvus]]'' | species = '''''C. frugilegus''''' | binomial = ''Corvus frugilegus'' | binomial_authority = [[Carolus Linnaeus|Linnaeus]], 1758 | range_map = Rook range map.PNG | range_map_width = 240px | range_map_caption = Rook range }} [[File:Corvus frugilegus MHNT.ZOO.2010.11.174.1.jpg|thumb|''Corvus frugilegus '']] The '''rook''' (''Corvus frugilegus'') is a member of the Crow family.<ref>{{cite book | last = Linnaeus | first = C | authorlink = Carolus Linnaeus | title = Systema naturae| publisher = Holmiae. (Laurentii Salvii). | date = 1758 | location = | pages = 824 | url = http://dz1.gdz-cms.de/index.php?id=img&no_cache=1&IDDOC=265100 | doi = | id = }}</ref> The crows are a [[Family (biology)|family]] in the [[Passerine]] [[Order (biology)|order]]. The rook is similar in size to the [[crow]]. It has black feathers, which show a blue or bluish-purple sheen (glint) in bright sunlight. The feathers on the head, neck and shoulders are dense and silky. The legs and feet are generally black, and the bill ([[beak]]) is grey-black. Rooks differs from the crow by the bare grey-white skin around the base of the adult's bill, in front of the eyes. The feathering around the legs look shaggier and laxer than the Carrion Crow. The young bird looks just like a crow because it lacks the bare patch at the base of the bill. Its food is mostly [[earthworm]]s and [[insect]] [[larva]]e, which the bird finds by probing the ground with its strong bill. It also eats cultivated [[cereal]] grain, smaller amounts of [[fruit]], small [[mammal]]s, [[acorn]]s, small birds, their eggs and young and carrion. ''Rooks always nest together'', usually in the very tops of the trees. Branches an