In mid-August several common darters had divided the water of Wetland Pool into their territories. many of them seemed to prefer resting or displaying on the wood of the footbridge railings or the planks of the waterside decking when they weren’t flying patrolling their territories.
There are at least four, possibly five, individuals here, all pictured within a few minutes. There were at least as many in the air. As far as I could see, all were male.