Animal that wears red pajamas in a popular children's book (5)

I believe the answer is:

llama

(Other definitions for llama that I've seen before include "South-American cud-chewing animal" , "S American animal related to the camel" , "South American cud-chewing mammal" , "Andean beast of burden" , "South American transport system" .)

I've seen this clue in The New York Times.

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