This is one of only three autograph drawings by Bosch. It is not a preparatory study but a work of art in its own right. It has a remarkable perspective with its close-up view of a gnarled treetop with three owls and other birds set against a broad landscape with villages and a group of horsemen in the background. The motif of an owl, a symbol of sin, is also found in his painting The Pedlar.
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