Barcelona (Freddie Mercury and Montserrat Caballé song) contained "Exercises in Free Love" from "The Freddie Mercury Album". The 1992 version of the 7" Spanish record had another version of "Barcelona" on the B-side, and the rare 1987 12" Hong Kong record was one-sided and had a unique sleeve. Most 5" CDs contained two or three versions of "Barcelona" and "Exercises in Free Love". Most 7" record and 5" CD covers featured Mercury and Caballé singing on a stage with an orchestra on the background, though the Portuguese version pictured them in a static studio photo. The 1992 reissue 7" records contained another version of the singing artists,
Montserrat and an ex-situ captive breeding population has been set up in partnership with Durrell Wildlife Conservation Trust, Zoological Society of London, North of England Zoological Society, Parken Zoo and the Governments of Montserrat and Dominica. Releases from this programme have already taken place in a hope to increase the numbers of the frog and reduce extinction risk from Chytridiomycosis. The national bird is the endemic Montserrat oriole ("Icterus oberi"). The IUCN Red List classifies it as Vulnerable, having previously listed it as Critically Endangered. Captive populations are held in several zoos in the UK including: Chester Zoo, London Zoo, Jersey