आत्मनो मुखदोषेण बध्यन्ते शुकसारिकाः ।
बकास्तत्र न बध्यन्ते मौनं सर्वार्थसाधनम् ॥
Atmano mukha doSheNa badhyante shuka sArikAH ।
bakaH tatra na badhyante maunaM sarvArtha sAdhanam ॥
Chirpy birds like the parrot get caught in the net because of their words. (because people like to have them as pet). A duck never gets caught because it does not make any sound. Anything can be achieved by being silent.