Elf Owl — Gallery CanvasThe world's smallest owl perches on a saguaro cactus in full bloom the bird compact and round eyed among the cactus spines, a saguaro flower just to its right, a small beetle visible on the cactus surface below. This 1973 watercolour is Glen at his most naturalist: the elf owl, the saguaro, and the Sonoran Desert flora are rendered with the same observational precision he brought to his Canadian subjects. Glen's interest in wildlife was never limited