Today I noticed that my camera battery had died, just after I left the house to go observing. This turned out to be a good thing, as I decided to focus on listening again, and to see if I could identify not only every bird that I saw, but also every bird that I heard. I walked by the Spree, where in the past months the waterfowl would be hanging around in their usual spots. But now, thanks to the constant parade of pleasure boats that churn up and down the river as soon as the weather improves, there was hardly a duck or coot to be seen, and no more swans or grebes or moorhens at all. (Many of these seem to have relocated to the pond in the Englischer Garten.)

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