In front of a mountain scenery, a group of five owls occupies a dominant position from where they scan their environment with the severity of Gestapo. The arid mountain and the heavy sky increase the anxiety.
The power of these birds is an illusion. They are not birds but leaf-bird hybrids planted in their eagle's nest from where they will never leave. The harm suggested by their uncompromising attitude will not be enforced.
The leaf-bird is thus the opposite of Miro's free bird. It followed the mineral-human hybrids with which Magritte was already questioning the deep nature of beings.