"The son of a frame-maker and art dealer from Antwerp, De Moor studied with Gerrit Dou, the leader of the Leiden fijnschilders, or fine-painters. De Moor was also a prominent member of the Leiden painters' guild and the Leiden Drawing Academy.
He painted genre scenes and narrative paintings but increasingly came to specialise in portraiture. Here, the boy holds a flagon that has been used as a bird's nest. Bird-pots were usually placed under a building's eaves to encourage them to nest. "