Yesterday I learned that this juvenile female peregrine, black green 08/BR, was found dead at Allegheny County Airport, apparently hit by a plane on Sunday July 9.
08/BR hatched at the Cathedral of Learning this year and left home to start her new life four weeks after she first learned to fly -- right on time. Just 6.3 miles away she found a big open space in which to hunt. Alas, she didn't know anything about airplanes.
The video below by Peter Bell shows her on 8 June 2017 at Heinz Chapel when she was new to flying.
Her death, and the death of her brother 09/AP, leaves only one surviving juvenile from the Cathedral of Learning 2017 nest. With a 62.5% mortality rate in their first year of life this peregrine brood has now matched the statistics, unhappy as that is.
Meanwhile, as of today July 14, we can confirm that the remaining young female is fine. She's been seen and heard nearly every day in Oakland, begging from her parents in a very loud voice. She's due to leave home any day now.
(photo and video of Pitt fledgling, black/green 08/BR, by Peter Bell)
UPDATE 21 July 2017: The young peregrine died at Allegheny County Airport, not Pittsburgh International. Thanks to Ryan for providing the correct information in the comments.