The number of bird species observed in the Archipelago National Park is abundant. Gulls, Arctic terns (Sterna paradisaea) and common terns (Sterna hirundo), eiders (Somateria mollissima), razorbills (Alca torda), and black guillemots (Cepphus grylle) nests on small bird islets. Mute swans (Cygnus olor), greylag geese (Anser anser), and common shelducks (Tadorna tadorna) build their nests in the peaceful archipelago, while Arctic skuas (Stercorarius parasiticus) keep watch from high cliffs. In the sheltered valleys of leafy islands live the nutcracker (Nucifraga caryocatactes) and the barred warbler (Sylvia nisoria). The Caspian tern (Hydroprogne caspia) and even the critically endangered southern dunlin (Calidris alpina schinzii) also inhabit the Archipelago National Park.

• The outer archipelago is well suited for monitoring bird migration.
• Popular birdwatching destinations of Jurmo and Utö.
• Birdwatching trips are rewarding on other islands as well. For example, Örö offers good conditions for bird watching year-round.
• In the outer archipelago, the sea often remains unfrozen well into winter. For example, purple sandpipers (Calidris maritima) migrate to spend the winter on the islets of the Archipelago Sea.