Bellows

Visited another area with a herd of red deer this morning, first thing.  The sun was out but frustratingly high cloud came over almost immediately, preventing better light on this mature stag, who is bossing the area.

I was one of many people watching the herd, many of them with long lenses.  We waited for perhaps half an hour before he got agitated and headed off towards another area, bellowing as he went.  I assumed he had heard a rival, but we didn't hear anything in the distance.