The exact reason for the decline in the 1950s is unknown as well. The Fish & Wildlife Services states that the eagles declined in the 1950s because of DDT. The problem with that statement is the fact that the bald eagle was recovering for many years before the nation banned DDT.
Elephants in the wild live to a range of 50 to 70 years. For well kept and fed animals in captivity, the oldest recorded is 82 years.
However, sea lions can live to be around 30 years old in captivity, in contrast to an average of approximately 20 years in the wild. Researchers have observed African zoo elephants with life spans of about 17 years, whereas wild ones in Amboseli lived 36 years. However, sea lions can live to be around 30 years old in captivity, in contrast to an average of approximately 20 years in the wild. This is a modal window.