Rudolph, the Red-nosed Reindeer

Rudolph, the Red-nosed Reindeer, is a character in a children's Christmas song. Rudolph is a reindeer (= a large grass-eating wild animal with large horns) who has a shining red nose. The other reindeer think his nose looks silly, but Santa Claus asks him to help the other reindeer to pull his sleigh on a foggy night, because his bright nose helps them to see where they are going.

Rudolph the red-nosed reindeer
Had a very shiny nose
And if you ever saw it
You would even say it glows.

In the US he is also a character in a children's television cartoon and has a nose that shines like a light.