sentences:  When this extrapolated into an estimated lifespan this results in 39 and half years as the average for adult golden eagles in this area, which is probably far too high an estimate.Survival rates are usually much lower in juvenile eagles than in adult eagles.In the western Rocky Mountains, 50% of golden eagles banded in the nest died by the time they were 2 and a half years and an estimated 75% died by the time they were 5 years old.