They are often laid at 90-120 hour intervals. Timing of development. Incubation lasts approximately 43-45 days, and is usually carried out by the female. Occasionally, the male will help, or even split incubation time equally with the female. The fledgling period lasts between 65 and 77 days.
Golden eagles acquire their adult plumage within approximately five years.
Main type of prey is jackrabbits, but also includes prairie dogs, squirrels, and some birds and reptiles. Other prey taken. Juvenile eagles will sometimes prey upon lambs when there is a decline in jackrabbit populations, though this rarely occurs. Typically, eagles will perch near a hunting area in a location that has regular updrafts, which allow the eagle to soar high above the hunting area to scan for prey. Golden eagles generally hunt solo, but sometimes hunt in male-female pairs.