Parent: Icteridae (American blackbirds)

└─ Molothrus (Cowbirds)

└─── Molothrus aeneus (Bronzed cowbird)

└─── Molothrus ater (Brown-headed cowbird)

└─── Molothrus bonariensis (Shiny cowbird)

└─── Molothrus oryzivorus (Giant cowbird)

└─── Molothrus rufoaxillaris (Screaming cowbird)