I saw this from a distance, and I could tell it was an animal (I thought it was a tall bird or something) but I was confused. When we got close enough for the dogs to see it, they were REALLY alarmed!
There's a video of Maggie investigating it, trapped in my camera (have to wait for Alexis to return with the laptop to share it with you all).
There are two of these artificial coyotes in the park (on the "island" for Alexis' and Alex' benefit) and they seem to be working, keeping the geese away. (How about that sun-scorched grass, by the way?)