Mbh 6.2.5a

Vaisampayana continued,--“That highly-blessed and holy grandsire of the Kurus, having said so, once more addressed Dhritarashtra and said,--‘Great will the slaughter be, O monarch, in this battle. I see here also (numerous) omens indicative of terror. Hawks and vultures, and crows and herons, together with cranes, are alighting on the tops of trees and gathering in flocks. These birds, delighted at the prospect of battle, are looking down (on the field) before them. Carnivorous beasts will feed on the flesh of elephants and steeds. Fierce herons, foreboding terror, and uttering merciless cries, are wheeling across the centre towards the southern region. In both the twilights, prior and posterior, I daily behold, O Bharata, the sun during his rising and setting to be covered by headless trunks. Tri-coloured clouds with their extremities white and red and necks black, charged with lightning, and resembling maces (in figure) envelope the sun in both twilights. I have seen the sun, the moon, and the stars to be all blazing. No difference in their aspect is to be noted in the evening. I have seen this all day and all night. All this forbodes fear. On even the fifteenth night of the lighted-fortnight in (the month of) Kartika, the moon, divested of splendour, became invisible, or of the hue of fire, the firmament being of the hue of the lotus. Many heroic lords of earth, kings and princes, endued with great bravery and possessed of arms resembling maces, will be slain and sleep lying down on the earth. Daily I notice in the sky during night time the fierce cries of battling boars and cats.[11] The images of gods and goddesses sometimes laugh, sometimes tremble, and sometimes again these vomit blood through their mouths and sometimes they sweat and sometimes fall down. O monarch! drums, without being beaten, give sounds, and the great cars of Kshatriyas move without (being drawn by) animals yoked to them.