Hallim Park Jeju S. Korea - "the last ostrich"

Because I posted these quite a while after I took them all, this appears earlier on the calendar than the other ostrich pictures I already posted.  There was a group of maybe 5 ostriches in this enclosure.  Some were friendlier than others.  One of them kept pecking at the rear tail feathers of another, who didn't much seem to care - didn't move away.  I don't know what that was about!