Eagles typically lay eggs every year but not more than one clutch per season, she said.
"So we won't have any more eggs from this pair this year."
Perrone is still pleased with Whitey's return and the fact that both eagles appear still to be nesting in the area.
"Sometimes nature doesn't do what we want it to do," she said. "But in this case we have a very pretty picture because we still have Whitey and Streaky together."
Whitey was hit by an Amtrak train moving about 50 mph.
Representatives with the Three Rivers Avian Society, as well as Parks Service personnel, looked for the bird after the incident but were initially unsuccessful.
However, Whitey was spotted on the nest three days after being struck by the train.
Bald eagles share duty when incubating eggs. The eggs almost certainly would have perished if Whitey had not returned because the female, Streaky, wouldn't have been able to guard them and hunt at the same time.
Streaky also might not have remained on the nest had her mate not returned. Bald eagles mate for life.
Whitey's return means the pair likely will remain in the nest next to W.Va. 20, Perrone said.
"We just hope Whitey has learned to stay off the tracks," she said.
Whitey was sitting on the tracks just before the train hit him.
Bald eagles historically remain in their nests year after year, she said. The animals also continuously add on to their nests, making them larger season after season.
"Some eagle nests are just gigantic," Perrone said. "There's one near the shuttle launch site in Cape Canaveral that NASA estimates weighs 5 tons."