For the same reason that the Owls try to kill the Crows while they sleep at night. 
fɔɹ ðʌ seɪm ɹizʌn ðæt ðʌ aʊlz tɹaɪ tu kɪl ðʌ kɹoʊz waɪl ðeɪ slip æt naɪt. 
 Indian's voice is very clear and comes across as very monotone in this recording. There's no noticeable reverberation or background noise, making the recording quality very good. Indian speaks at a moderate pace.