Larus ridibundus and Sea gull

Larus ridibundus noun - Small black-headed European gull.

Sea gull and Larus ridibundus are semantically related. In some cases you can use "Sea gull" instead a noun phrase "Larus ridibundus".

Sea gull noun - Mostly white aquatic bird having long pointed wings and short legs.

Larus ridibundus and sea gull are semantically related. Sometimes you can replace phrase "Larus ridibundus" with "Sea gull", this phrases are similar.