Bald eagles at the Hays nest are sitting on three eggs. Eagle watchers noticed the newest addition to the clutch at about 3 p.m.
Rachel Handel of the Audubon Society of Western Pennsylvania said still images showing three eggs were posted on the group's website.
"Right on cue," executive director Jim Bonner said.
Last year the Hays pair lost their entire clutch. Bonner said we'll know in a few weeks whether these eggs have survived.
"They have a 35-day incubation and there was about a week between the first and third egg," Mr. Bonner said. "So about the week of March 20 we'll know."
At the Harmar nest site, the eagles remain active. Mr. Bonner said he's certain no eggs have been laid because both birds have occasionally left the nest at the same time.
"Based on past history, they're usually about a week after Hays."
Watch the eagles live at www.post-gazette.com/baldeagles.