The islands are a punishing land, but a place of abundance. They are a major breeding ground for seabirds who nest on steep cliffs and rely on the rich marine environment for food. During the summer months, the archipelago becomes a vital stop for migratory species traveling between North America and Asia. The Aleutian cackling goose is an endemic subspecies of the Canada goose, notable for its smaller size and adapted to the harsh world of the Aleutians. Raptors including peregrine falcons, eagles, and hawks also call these windswept rocks home. The islands are affected by introduced species including cattle, caribou, foxes, and rats: the ecosystems and animals are visibly different on islands with introduced mammals.

Aboard the C/V Miss Alyssa on the passage from Dutch Harbor to a project on Unalga Island, we encountered something unusual for the Aleutians: blue skies, light winds and calm seas. Dutch Harbor averages 80 inches of rain, 250 rainy days, and 150 days of fog per year. Meanwhile, powerful Pacific storms batter the islands throughout the year with gale-force winds, typhoons, and dangerous storm surges.

With the exception of some stunted willows, the vast majority of the chain is devoid of native trees. On some of the islands, there are a few coniferous trees left over from the Russians. Aleutian conifers, some up to two hundred years old, rarely reach even 10 feet tall because the winds here like to snap off anything taller.
