Oh! Do they?? I have clicked them flock many a times! There's 18 of them.. :) They certainly dont follow the Kejriwaal's odd-even formula :P Image source: My Gallery. read more
They don't always fly in odd numbers, they always fly in a shape that could have odd numbers, a V, and that is why you assume there is an odd number. There is usually more birds on one side than another. read more
I found 10 photos of small flocks of geese at random. In six of them, the number of birds was odd; in the other four even. read more