There is a difference between 'vibrato' in singing and 'ornamentation', though some vibrato can be so pronounced that it sounds as if the pitch of the note varies.

In Rufford Park Poachers as sung by Joseph Taylor, both vibrato and ornamentation can be heard. The vibrato occurs when he holds the same pitch of note. At other times he uses flourishes or glissando.

Ewan MacColl uses a great deal of ornamentation.