From Wikipedia:

In the religion of ancient Rome, a haruspex was a person trained to practice a form of divination called haruspicy, the inspection of the entrails of sacrificed animals, especially the livers of sacrificed sheep and poultry.

For the character in the Pathologic series of video games, see haruspex_(pathologic).

For the species in Warhammer 40,000, see haruspex_(tyranid).