The tree swallows frequently squabble over nesting boxes and nesting materials. The two in the photo were a few feet from a nesting box that was probably the cause of the dispute.
There are also a pair of nesting Ospreys at Kensington Metro Park. There nest is visible from the road. If you take the Milford road entrance the nest is in the first lake on your right. This is a shot I got of the male bringing a branch to the nest.
Thank you again for sharing your photos! You can see more of Rodney Campbell’s impressive work at: http://rodney-campbell.artistwebsites.com/art/all/birds/all. And if anyone else would like to share a photograph of nature send it to firstname.lastname@example.org and I'll put it on the Friday Photo posts.