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en.wikipedia.org/wiki/Beak

The beak, bill, or rostrum is an external anatomical structure of birds that is used for eating and ... Although beaks vary significantly in size, shape, color and texture, they share a similar underlying structure. ..... All birds of the family Anatidae (ducks, geese, and swans) have a nail, a plate of hard horny tissue at the tip of the ...

en.wikipedia.org/wiki/Muscovy_duck

The Muscovy duck (Cairina moschata) is a large duck native to Mexico, Central, and South ... The amount of white on the neck and head is variable, as well as the bill, which can be yellow, pink, black, or any ... A blackish or dark red knob can be seen at the bill base, and the bare skin of the face is similar to that in color .

www.avianaquamiser.com/posts/How_to_tell_male_and_female_ducks_apart

May 30, 2014 ... If you don't want to vent-sex your birds, the best way to tell drakes from ducks is by voice. You may have some success with bill color as well.

animalcorner.co.uk/animals/ducks

The males will now look like the female in colour and will be unable to fly temporarily. They will ... However, ducks beak comes in different shapes and sizes.

www.allaboutbirds.org/simple-steps-for-identifying-confusing-brown-ducks-females-and-otherwise

Nov 21, 2014 ... The bill is fairly thin for a duck, and the bird has a fairly long body and short tail. There's little else around for scale to help judge its size. Color ...

www.countryfarm-lifestyles.com/sexing-pekin-ducklings-by-bill-color.html

I've been told that the color of a Pekin duck's bill can indicate its sex. However, I did't get what color for what sex! I have 4 Pekin ducks. One.

www.ducks.org/conservation/waterfowl-research-science/the-scoop-on-duck-bills

Lamellae are another fascinating adaptation of the waterfowl bill. ... The wood duck eats acorns, seeds of moist-soil plants, some vegetation, and aquatic insects.

www.earthtimes.org/scitech/bright-beaks-equals-delight-ducks/718

Apr 14, 2011 ... In mallard ducks, there's an easy way to distinguish between males' resistance to ... They found that the brighter the beak colour, the higher the ...

www.popsci.com/science/article/2010-02/why-do-ducks-have-orange-feet

Mar 3, 2010 ... But for the ducks that do have orange feet, well, it's all about attracting the ladies. ... they exhibit so many wonderful colors, I wonder which ones females ... All they cared about was the brightness of the guy's yellow-orange bill.

www.backyardchickens.com/threads/muscovy-duckling-colors.656769

Apr 25, 2012 ... I was wondering if someone could tell me what colors my duckling might ... if i get a yellow duckling with a blue beak it'll turn out blue barred.