While some birds head further north to breed, over 113 species stay at Seedskadee NWR through the summer to breed and raise their young. Young of the year birds can be seen as early as April when the bald eagle eaglets make their debut. Young of the year pronghorn fawns, mule deer and white-tailed deer fawns, and moose calves are born during May and into June. Trumpeter swan cygnets begin to hatch in mid June, but may not be readily observed for months as the adult swans hide them in heavy wetland vegetation. Later in June and July, visitors can view ducklings in the wetlands and a number of species of young sparrows, thrashers, and other songbirds throughout the Refuge as they learn to fly. Beginning in mid June and continuing through early September, sage grouse hens lead their young to the Refuge's wet meadows and riverine areas for water, insects, and the palatable green vegetation. Hummingbirds arrive to the refuge late, usually late June, and stay into the fall, they are often seen around the visitor's center with their long, needle-like beaks buried in a Rocky Mountain beeplant or showy milkweed bloom.