This can come in several different forms. A bird's beak may act like a nose, with a human-like mouth underneath, or their beak may be flat against the face and be moveable like a mouth. A less extreme case involves a small or nonexistent lower beak which the bird can use to express while still keeping the effect of a realistic beak.
Often results in Informed Species, or in worse cases, Uncanny Valley. Subtrope of Funny Animal Anatomy and Artistic License Ornithology. See also Feather Fingers and Toothy Bird for more common tropes involving anthropomorphic avians, and Crying Critters for another instance of animals emoting in a way that breaks biology. Compare Expressive Skull and Expressive Mask for other faces that shouldn't emote but do. Not to be confused with the other definition of "mouthy", in that case see Polly Wants a Microphone for talkative birds.
- A 2020 commercial for Froot Loops was criticized online for its redesign of mascot Toucan Sam; among the complaints was that Sam had a Cheeky Mouth on the side of his face.
- Toucan Sam's original design is also an example in that his small lower beak acts as a mouth which he uses to smile.
- Kerem A Kovetkezot: Bird characters, including the owl protagonist Dr. Bubo, all have human-like mouths under their beak-shaped noses.
- Kirby: Zigzagged with King Dedede. Averted the earliest games where he was shown almost exclusively from the side which emphasized his relatively normal and unmouth-like beak. Once Art Evolution kicked in, he started being shown more from the front, which made him fall into a type 2, right down to having teeth in some depictions. Currently it's downplayed with his current 3D model which, while still plenty expressive, is stiffer and longer, making it generally more evocative of his early more bird-like beak.
- In The Legend of Zelda: The Wind Waker, the bird people known as the Rito look almost identical to humans except for beaks over their nose, with human mouths underneath. (By contrast, the Rito in The Legend of Zelda: Breath of the Wild are far more bird-like, with almost no human characteristics and true beaked mouths.)
- The penguins in Club Penguin have strangely round beaks with the regular mouth on the short lower mandible and the bigger upper mandible functioning like a snout. The first design was more natural, with round beaks moving more like a beak yet with human expressions and the same small jaw. The stop motion animated specials use Cheeky Mouth on the still round beaks.
- Hawlucha has a regular mouth under its beak, which looks more like a nose.
- Togekiss is either a bird or a creature resembling one that has no beak at all, instead having a cute little mouth.
- The Babylon Rogues from Sonic Riders are a trio of birds who all have flat beaks they can use to fit in with the style (the mammal characters have short snouts) and make various facial expressions. Whether or not they have teeth depends on the artist; the games don't depict them with teeth, but the Archie comics do.
- This◊ artwork from Yoshi's Story, has a Bumpty's beak flat against its face, almost resembling lips.
- In this kids' song, the bird and his dad are drawn with mouths beneath their beaks, making the beaks look like noses.
- In Ashens 2012 Christmas Special he reviews a penguin toy whose "beak" is merely a painted on rounded triangle...
Ashens: It took me awhile to see that red thing as a nose, it's more like it's got a singing mouth or something.
- Serina: The Vivas are a group of live-bearing birds whose herbivorous members have developed fleshy lips and snouts over their◊ beaks◊.
- In the 3-2-1 Penguins! episode, "Give and Let Give", the lawn flamingo aliens' beaks function more like noses, with mouths underneath them.
- Dodo and all other birds that appear in Animal Crackers have their beak as a nose, with a "normal" mouth under it.
- The bird characters in Birdz have beaks that look more like snouts, complete with teeth.
- SwaySway and Buhdeuce from Breadwinners are ducks with lip-like bills that make them look more like frogs.
- The main trio of Chop Socky Chooks are chickens with beaks that look like human lips, making it difficult to identify them as chickens.
- The titular character of Harvey Beaks and his family have yellow lips instead of beaks, despite their family name.
- Oliver Owl from the early Looney Tunes shorts has a big wide mouth with a small hooked beak-like nose above it.
- Beaky Buzzard, another Looney Tunes character, has a small lower beak that acts like an expressive mouth.
- Pird, a minor character on OK K.O.! Let's Be Heroes, is a bird person designed to look like Pearl. His beak is a long, thin nose with a human mouth underneath.
- Not really a bird, but platypuses are often depicted with bills that are depicted as looking like regular mouths or noses in cartoons.
- Tiny Toon Adventures has Gogo Dodo, a green dodo bird, whose beak resembles a pointy nose with a mouth underneath.
- A good example occurs in the Disney Silly Symphony cartoon short Who Killed Cock Robin?, which features a cast of birds. The beaks of the feminine Jenny Wren and the effeminate Cupid are animated as red human lips; that they are actual beaks is made apparent from views of Jenny's profile and Cupid's silhouetted shadow.
- An interesting Real Life example comes from the fact that the beak had to evolve before it could actually be borne by birds; early prehistoric birds, if they may be considered as such (that is, winged and feathered dinosaurs, from which group modern birds evolved) had profiles that were broadly similar to those of modern birds, but had multiple features that were more reptilian in nature, including a toothed snout rather than a modern beak.
- Potoos are birds with very small beaks and very wide mouths, which they use to catch bugs while in flight. The visual effect greatly resembles some versions of this trope, with the mouth overtaking the beak.