He took this development to a new level with his 1953 orchestral work "Réveil des oiseaux"—its material consists almost entirely of the birdsong one might hear between midnight and noon in the Jura. From this period onwards, Messiaen incorporated birdsong into all of his compositions and composed several works for which birds provide both the title and subject matter (for example the collection of thirteen pieces for piano "Catalogue d'oiseaux" completed in 1958, and "La fauvette des jardins" of 1971). Paul Griffiths observed that Messiaen was a more conscientious ornithologist than any previous composer, and a more musical observer of birdsong than any previous ornithologist.