Yes, Grackles and that photo of the one leaping forward is awesome!
We used to get Grackles in droves, raiding the bird feeders; large flocks are very loud! Beautiful canine (Malamute or Husky?) It sure looks like he wants to be a retriever! Looks like a nice area for horseback riding too and Kayak School looks like fun! My husband talked about getting a Canoe or a Kayak when we moved here a year ago. He thought it would be fun to paddle through the St. Sebastian River. There's a boat dock and launch right here in the neighborhood but our neighborhood is at the south prong of the river, very narrow and very brackish water with lots of gators ... so, it was a No for me. I told him I'd sit at one of the picnic tables under the gazebo at the dock and wait for him to return.