The southern white-crowned shrike (Eurocephalus anguitimens) is a species of bird in the family Laniidae.

The sexes are alike; in the adult bird the crown and forehead are white, and the mask is black and extends above and below the eye to the side of the neck.

Juveniles are similar to adult birds but the crown is slightly mottled and barred and grey rather than white.

[2] Like the closely related northern white-crowned shrike, this species is highly sociable and will form small, tightly-knit groups of usually three to six individuals, but occasionally up to twenty outside the breeding season.

Members of the group engage in cooperative breeding, join together in building a brooding nest, take turns in sitting on the eggs, and assist in the feeding of nestlings.