Leaving the willow walk it was noticed that there were many gulls circling over the slurry,the oil terminal and the railway land. Upon walking a few metres along the railwayside path many large dragonflies were seen darting rapidly here and there in a large swarm. In the next 50 metres or so it was estimated that there were approximately 100 dragonflies to be seen around eye-level. They looked like Migrant  Hawkers and it is probable that the gulls were hunting  them. AE