Comparison of bird beaks, displaying different shapes adapted to different feeding methods. Not to scale.

The beak, bill, or rostrum is an external anatomical structure of birds that is used for eating and for preening, manipulating objects, killing prey, fighting, probing for food, courtship and feeding young. The terms beak and rostrum are also used to refer to a similar mouth part in some dicynodonts, Ornithischians, cephalopods, cetaceans, billfishes, pufferfishes, turtles, Anuran tadpoles and sirens.

Although beaks vary significantly in size, shape, color and texture, they share a similar underlying structure. Two bony projections—the upper and lower mandibles—are covered with a thin keratinized layer of epidermis known as the rhamphotheca. In most species, two holes known as nares lead to the respiratory system.


Although the word beak was, in the past, generally restricted to the sharpened bills of birds of prey,[1] in modern ornithology, the terms beak and bill are generally considered to be synonymous.[2] The word, which dates from the 13th century, comes from the Middle English bec, which itself comes from the Latin beccus.[3]

Other Languages
العربية: منقار
armãneashti: Dintanâ
asturianu: Pico (zooloxía)
беларуская: Дзюба
беларуская (тарашкевіца)‎: Дзюба
български: Клюн
bosanski: Kljun
català: Bec
čeština: Zobák
dansk: Næb
Deutsch: Schnabel
eesti: Nokk
Ελληνικά: Ράμφος (πτηνά)
Esperanto: Beko
فارسی: منقار
français: Bec
Frysk: Snaffel
Gaeilge: Gob
galego: Peteiro
한국어: 부리
हिन्दी: चोंच
hrvatski: Kljun
Ido: Beko
Bahasa Indonesia: Paruh
Iñupiak: Sigguuk
italiano: Becco
עברית: מקור
ქართული: ნისკარტი
қазақша: Құс тұмсығы
latviešu: Knābis
lietuvių: Snapas
lingála: Ekóngó
magyar: Csőr
მარგალური: ნინძგი
Bahasa Melayu: Paruh
Nāhuatl: Tehuitztli
Nederlands: Snavel
Nedersaksies: Sneb
日本語: くちばし
Napulitano: Pizzo
norsk: Nebb
norsk nynorsk: Nebb
occitan: Bèc
پنجابی: چنج
Plattdüütsch: Snavel
português: Bico
română: Cioc
Runa Simi: Chhukruna
русский: Клюв
саха тыла: Тумус
Scots: Beak
sicilianu: Pizzu (mascidda)
Simple English: Beak
slovenčina: Zobák
slovenščina: Kljun
српски / srpski: Kljun
srpskohrvatski / српскохрватски: Kljun
suomi: Nokka
svenska: Näbb
Türkçe: Gaga
українська: Дзьоб
Tiếng Việt: Mỏ (chim)
žemaitėška: Snaps