Which large dark peregrine is found on the American northwest coast?

The large dark peregrine found on the American northwest coast is known as Falco peregrinus pealei. This subspecies of the peregrine falcon is characterized by its darker plumage and is often referred to as the "Peale's peregrine." Its habitat includes coastal areas where it can be found hunting seabirds and other prey.

In contrast, the other peregrine subspecies have different geographic distributions and physical characteristics. For example, Falco peregrinus anatum, also known as the American peregrine, is more widespread across North America but does not have the same dark coloration typical of those found on the northwest coast. Falco peregrinus tundrius is adapted to tundra regions and has lighter plumage suited for its habitat. Lastly, Falco peregrinus peregrinus is the nominate subspecies found in Europe and Asia, which generally features characteristics that differ from Peale's peregrine.

Understanding these distinctions is important for identifying these birds and appreciating their adaptations to their respective environments.