See that black mass out there in the ocean? It's not an oil slick or even a cloud shadow.
It's a flock of sea birds, as far as the eye can see from one side of Half Moon Bay to the other. The birds are called Shearwaters. There are 30 different kinds of shearwaters, and we believe these are sooty shearwaters. These birds live on the water and come on land only to breed. They migrate up to 40,000 mil...