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.
Some studies say wild elephants live as long, or longer, than elephants in zoos. According to Willis, animals die at a zoo far more than anyone hears about, but the number of deaths isnât indicative of a good or bad zoo.ome studies say wild elephants live as long, or longer, than elephants in zoos. According to Willis, animals die at a zoo far more than anyone hears about, but the number of deaths isnât indicative of a good or bad zoo.