What was the first song that kino hears in the morning in the novella the pearl?

Kino hears the song of the enemy when he is about to attack the trackers at the end of the book.

"And Kino's own music was in his head, the music of the enemy, low and pulsing, nearly asleep. But the Song of the Family had become as fierce and sharp as the snarl of a female puma."