What is the common name for Chroicocephalus ridibundus?

Black-headed gull is the common name of Chroicocephalus ridibundus.

Specifically, an older scientific name is Larus ridibundus. That form still may be found even though scientists tend to accept reclassification of many gulls out of the genus Larus. The meaning of the currently accepted scientific name is colored (from Greek "Chroa") headed (from Greek "cephalus") laughing (from Latin "ridibundus") gull.