Shearwaters are another bird to watch in the North Pacific. These highly migratory birds move in groups of thousands. Krill are essential parts of the food chain. If you spot a soaring frigate, move in that direction. If the bird is high in sky, take a look at the position of the sun.
Frigates position themselves to watch their targets with minimum glare.
Frigate birds cannot land on the water or dive. They pick up their prey with their beak and generally require an assist from feeding fish. If you spot a frigate going down to the water, troll in that direction, tout de suite. Pelicans have made a fantastic comeback from the DDT-laced brink of extinction. The assortment of sea birds is seemingly endless.