Adults do not visit flowers, instead feeding on rotting fruit, carrion, and mud. Adults are in the habit of resting on tree trunks where their mottled appearance makes them inconspicuous. On the approach of another butterfly, a male will take to the air, emitting a cracking sound; if the approaching butterfly is a male, it will respond with a crack while a female will remain silent, and this enables the male to select a partner of the opposite sex. In the evening, the butterflies congregate on the trunk of one tree before flying into nearby trees and bushes to roost separately.

From Wikipedia article at https://en.wikipedia.org/wiki/Hamadryas_glauconome which is released under the Creative Commons Attribution-Share-Alike License 3.0.