Is this behaviour unusual?

Observation - Is this behaviour unusual?. Description: Watched Banded Demoiselles over canal being chased off by what I think was a Speckled Wood butterfly whenever they flew over the patch of hard clay on which he was sitting by the towpath. He did not respond at all when Common Blue damselflies flew over or

Watched Banded Demoiselles over canal being chased off by what I think was a Speckled Wood butterfly whenever they flew over the patch of hard clay on which he was sitting by the towpath. He did not respond at all when Common Blue damselflies flew over or near him. Watched this for almost an hour.