Olivier Messiaen
His first wife died in 1959 and he remarried in 1961.  He also became very interested in birdsong and spent a lot of time with his wife in the country with a tape recorder recording birdsong.  He imitated the birdsong in his music, especially in piano pieces called Oiseaux exotiques (Exotic birds) and the Catalogue d’oiseaux (Catalogue of birds).