Last night we saw a scuffle between four Canada Geese on top of the warehouse behind our house. Two of the geese were acting aggressive towards the other two, who eventually flew off. I managed to get a video of the incident.
The remaining birds stayed there for about 20 minutes before flying off. One of them appeared to lay down while the other stood erect and looked around the whole time. We wondered if they could be staking out a possible nesting spot. The roof is at a slight angle, so I don’t think it would be a good spot for them to nest, even though Canada Geese have been known to nest on rooftops (caution: that last one links to a cam. You have been warned).