balino ’nye nirāmiṣāḥ
sa sukhaṁ samavindata
Incited by the modes of nature, birds become violent and kill other birds to eat them or to steal meat captured by them. Hawks, vultures and eagles are in this category. However, one should give up the envious propensity to commit violence against others and should take to Kṛṣṇa consciousness, whereby one sees every living entity as equal to oneself. On this platform of actual happiness one does not envy anyone and thus sees no one as his enemy.