One of three baby peregrine falcons nesting on the ledge of a downtown skyscraper made its return home Saturday after being treated at a wildlife rehabilitation center in Delaware.

The baby boy falcon was sent away for treatment after he appeared to have a cold and be dehydrated, said Craig Koppie, a raptor biologist with the U.S. Fish and Wildlife Service.


Koppie first noticed illness on Thursday while placing identification bands on the three eyasses (as baby falcons are known) at the Transamerica Tower.

The eyas and his two siblings, both female, are less than a month old and are the stars of a webcam launched by the Chesapeake Conservancy this spring. Peregrine falcons have nested on the 33rd-story ledge at 100 Light St. since the late 1970s, but for more than a decade, few had been aware of their presence until the webcam went online.

The male eyas was taken to Tri-State Bird Rescue and Research in Newark, Del.

Male eyasses normally take their first flight 35 to 38 days after birth, while females take slightly longer. That rehabilitation timeline could have the male back in the nest before then, Koppie said previously.

"It's easy enough to put him back out with his sisters," he said. "We have plenty of time to get him back in before they all fly."

Baltimore Sun reporter Jessica Anderson contribute to this story.