Casteels highlights ten empirically proven facts about birds and their songs, as well as discusses the approaches European art music composers have taken with regards to birds. He then goes on to give a background and a brief analysis on his composition for the grand finale of the Singapore Botanic Gardens' 150th Anniversary, Bird Songs. The article closes with a recommendation of specialised literature relating to some interesting aspects of birds.

Book-object created by Raphaël Casteels in 2007 comprising: - one case sculpture out of plexiglass of 26 x 26 x 11.4 cm; - two oriental bindings type daifuko cho on two note-books published on Darwin paper of 160gsm, 26 pages, 10 pictures; specimen number I/V; - one catalogue published by Robert Casteels, National University of Singapore, in 2006

Asian Folktales and Legends was the title of a special concert conceived and given by Robert Casteels with the National University of Singapore’s guitar orchestra in 2010. A poet wanders, muses and invites the listener down Asia’s memory lane with guitar music from Brunei Darussalam, Indonesia, Japan, Malaysia, Singapore, Thailand and The Philippines.

This analysis of part two of my composition entitled Berlayar ke Mata Hari 5 opus 25 shows the structural organisation in 5 sections, the harmonies spread over nine octaves and the time as well as numerical proportions in relation to number 19, which was the key number of all 19 pieces that constitute the Berlayar cycle, composed and premiered from 1997 to 1999.

Bar by bar analysis of the theme and twelve variations that constitute the 2009 composition opus 66 entitled Bird Songs.