O is for Ornithology. Sir Peter Blake. Type: Silkscreen Print. Published: 1991. Image Size: 510 mm X 722 mm. Paper Size: 780 mm X 1020 mm. Edition Size: 95. O is for Ornithology by Sir Peter Blake is from his 1991 alphabet letters series. Ornitholgy-the study of birds, is obviously of cnosiderable interest to Blake, who features illustrations of birds in many of his collage-style silkscreens. Here, he focuses on the pretty and colourful domestic canaries, featuring a collage of educational postcards that identify each type of bird.