"There is a drop of blood in the snow before me.... The coyote... is in estrus.... spurred to let out a bit of herself, sending a message, telling everyone she was now ready, that the clock of her winter was ticking toward spring."

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I also used these realistic sounds in a psychological way. With The Good, the Bad and the Ugly, I used animal sounds - as you say, the coyote sound - so the sound of the animal became the main theme of the movie.

— Ennio Morricone