Jurors rejected Steven Allan's claim that mother-of-one Rebecca Sivyer, 23, caused the fatal crash.
Police say the body was found on Wednesday afternoon and inquiries are ongoing into the woman's death.
John Carswell Jr, 47, was driving a 911 Carrera when the accident happened between Alyth and Meigle.
The 47-year-old man was driving a grey Porsche when it crashed on the B954 between Alyth and Meigle.
The birds, named Harry and Flora, return to Alyth after spending the winter in Africa.
Steven Day lied about his mother dying and having cancer to cover up his deceit, a court hears.
