Every day there are more of them. At first there were only a few, but they are increasing in numbers. They are communicating with each other, planning to take over. We humans are isolated, staying indoors, frightened of the unseen threat from outside and the birds are taking advantage of it. They are arriving in flocks, descending together: just sitting there and watching. They even chirp together and suddenly there is silence. You could hear a seed drop. It is as if a command has been issued. Even the silence is deafening. And now the crows are approaching.