Man-of-war bird and Pelecaniform seabird

Man-of-war bird noun - Long-billed warm-water seabird with wide wingspan and forked tail.

Pelecaniform seabird and man-of-war bird are semantically related. In some cases you can use "Pelecaniform seabird" instead a noun phrase "Man-of-war bird".

Pelecaniform seabird noun - Large fish-eating seabird with four-toed webbed feet.

Man-of-war bird and pelecaniform seabird are semantically related. Sometimes you can replace phrase "Man-of-war bird" with "Pelecaniform seabird", this phrases are similar.