(He carried around the dead body of his brother and did not know what to do with it.) Then Allah sent a crow, which dug the ground to show him how to bury the dead body of his brother. “Alas!” He cried, “I failed even to be like this raven to find some way to dispose of the dead body of my brother!” So he became full of regrets.
Meaning:-
Raven: the largest bird in the crow family, with shiny black feathers.