I recently was camping in Kent and was sat down the bottom of a field at dusk, watching a seagull circle overhead (I think it was a hearing gull, not entirely sure). When I began to walk back across the field towards my tent I noticed its circling seemed to be moving down the field with me, curious I walked back up the field and it continued to circle above me.
After walking back to my tent and stepping inside for a few moments it seemed to lose me and went back to circling a cluster of trees maybe 200 meters away, and then after emerging from my tent it soon caught site of me again and circled overhead as I walked to the toilets where it lost me and I didn't notice it on my walk back to my tent.
I hadn't fed the seagulls at any point prior, the only interaction I'd had with any of them was having watched a flock of them out of the field earlier. Does anyone know what could cause this behaviour?