I assume that the Eider sighting was of a juvenile King, not a Common. A single juv. King seems to prefer kipping-out at Sam Smith many years. It’s like it has a standing reservation. Where was the Canvasback?
Was it on the eastern shore of the marina bay? There is usually a Mockingbird at Humber Bay East located in the stretch of hedges that parallels the gravel path that leads to the small bridge/culvert spanning the mouth of the lagoon. The hedge is on your left side as you walk toward the bridge from the street, sort of the park entrance. For some reason a MB is so often hidden within the hedge. Sometimes it sticks its head out to call “scram” and then it disappears back into the hedge.
The first shot was taken at CSS and the other two near the Humber Bay hedge. Both of the last shots were taken with a point-and-shoot as I was learning how to use it. The first one was taken with my T4i just after I got it using the kit lens 18mm - 135mm.