mud puddling

Lepidoptera (butterflies and moths) are diverse in their strategies to gather liquid nutrients. Typically, mud-puddling behavior takes place on wet soil. But even sweat on human skin may be attractive to butterflies such as species of Halpe. More unusual sources include blood and tears.
This one is common evening brown butterfly..
Fact: fact is this species never opens its wings till its death when in sitting position..
There are exceptions where experts says may be the one with opened wings are newly hatched..