The killing of Shakuni is describe in the Mahabharata.
Explanation: This statement has been taken from the lesson 'आश्रमवर्णनम्'. According to this statement, the killing of Shakuni is in the Mahabharata as told in the ashram but elsewhere there is no killing of Shakuni (the bird).
Thus, by mentioning the killing of Shakuni in the Mahabharata, the writer wishes to say that 'अहिंसा परमो धर्म:' is the culture of ashram. Shakuni was killed in the Mahabharata because of his cunning nature. But in the ashram of Jabali no Shakuni (bird) is killed. Thus, this statement indicates that the birds were protected in the ashram.