Koyukuk National Wildlife Refuge is home to a wide variety of birds, mammals and fish of the boreal forest. Thousands of waterfowl, primarily wigeon, pintail, scaup, white-fronted geese and Canada geese are joined by both trumpeter and tundra swan on the Koyukuk's lush breeding grounds each spring. Refuge streams and lakes aslo sustain large fish populations that support subsistence, commercial and sport fisheries. King, silver and chum salmon migrate up the waters of the Yukon river and it's tributaries including the Koyukuk River. Resident fish, such as the predatory northern pike, spend their entire lives in refuge waters. The refuge's mosaic of forests, woodlands, tundra and grasslands are home to many northern mammals, from majestic moose to tiny shrews and voles. More than 140 bird species, 30 mammal species, and 14 fish species occur on refuge lands and waters. Follow the links below to find out more!