As one of the longest distance migrants in the animal kingdom, the Forth is an internationally important wintering site for long distance travellers like these. Flocks of knots can be up to 100,000 in size. Breeding in the far north of Canada, Europe and Russia, they migrate from the Arctic between August and May.
They fly together in a dance-like way called a murmuration. As you can see in my model, there are lots of birds coming in to land to feed in the muddy waters and shorelines.
They are a lovely silver grey with white underneath. Their lifespan can be up to 7 years, and when born they are chunky and have stubby green legs.