I spent some time here yesterday after Simba went to the vet for the last time. It is a grove of Common Hackberry trees near the river. Although not common this far north of Lake Erie, there used to be a number of Hackberry groves in the Ottawa area where local conditions were favourable. Most are gone because of urban pressure and this is one of the few remain groves in Eastern Ontario. If I can find some seedlings, I will plant a grove of them near where my two cats are buried in the yard. Maybe they can fertilize another grove.