Euphagus cyanocephalus, commonly known as Brewer's blackbird, is a close synonym of the Euphagus Carilonus. Euphagus Magnirostris, also known as the thick-billed blackbird, is another closely related synonym. Other synonyms for Euphagus Carilonus include Merula carilonus, Agelaius carilonus, and Sturnus carilonus. These birds belong to the icterid family and are known for their distinctive black coloration and sharp, pointed bills. They are found throughout North America, with some migratory populations in Central and South America. Euphagus Carilonus, like many blackbirds, is a social species that often forms large flocks outside of the breeding season.