If this is the case in the US, how come some of ours are so dumb.
The world infamous shopping trolley Coots. Taken at the end of last week. Although they have managed to find a large pink flower to replace the Nike trainer (houseproud obviously) they have manifestly been unable to raise the height of the nest despite the suitability of the site to do so. Indeed the bird seems to be even lower in the nest site than usual. A visit yesterday found no eggs and nothing sitting.
Wandle mouth mentalist. This is a bird sitting on a nest that is exposed for no more than two hours a day. Yet it continues to leap on it once exposed, grab some materials to add and then sit tight, while it's mate attacks anything that comes close. Even if it is 10 times bigger than it. About 10 minutes after this photo was taken the tide was up to it's belly.
Brent Res Coot with a bloody skyscraper! Non-tidal water, with just a little bit of structure to hold on to, and the nest is proper high.
In conclusion, with the evidence supplied within, I have no option but to surmise that the Coots on the Wandle are retards.