Svend Frisch was an artist who among other things drew Brazilian birds, eventually including some illustrations for books he coauthored with Johan.
In 1962, Johan released some of his recordings as an album on LP vinyl, Canto das Aves do Brasil (Songs of the Birds of Brazil).
[2] The following year he released his second album, entitled Vozes da Amazônia (Voices of Amazonia), which contains the song of the musician wren.
In 1974, he released the CD album Sinfonia do Natal with Christmas songs such as Silent Night and Jingle Bells interspersed with sounds of birds.
Frisch had a successful career as an engineer, and in 1976 designed the wastewater treatment station at São Paulo–Guarulhos International Airport.
Around this time he was among the founders of Associação de Preservação da Vida Selvagem, a wildlife conservation organization that marks "National Day of the Bird" every 5 October.