This publication presents a facsimile of a sketchbook by the Dutch artist and illustrator Peter Vos (1935-2010), along with a volume of introductory essays. The title derives from the sketchbook's detailed drawings of 333 birds. From time immemorial people have been fascinated by birds and have created images of their winged companions. The artist Peter Vos was one of them. He kept bird diaries in which he noted down the birds he came across and captured them in pen and ink and watercolour. He took pleasure in entrusting all elements of a bird to paper - their characteristics, but mostly their characters.