Butterflies - Macro Photography

Some time ago while in the farm, I found two butterflies perching a ground and feasting on a dead and rotten something.

Initially, I didn't notice that rotten dirt there but as time pass by, I saw butterflies approach there. The first perched on a stony ground initially before moving to where those dirts were. Some moments later, another butterfly showed up.

That was actually my first time of getting to know that such insects do feed on rotten dirts.