While the movie is a powerful "civil commitment" film that critiques the inhumane prison system of the time, it took significant creative liberties with the actual history of Robert Stroud.
The film follows the life of Robert Stroud, a violent inmate who is sentenced to life in solitary confinement after killing a prison guard. During his long years of isolation, he finds an injured bird in the prison yard, which sparks a lifelong passion for birds. Despite the harsh conditions of the penal system, he conducts extensive research, writes books on bird diseases, and even develops cures for avian illnesses. John Frankenheimer. L'UOMO DI ALCATRAZ 1962
The film portrays Stroud as a quiet, redeemed intellectual. Historical records and prison psychiatrists, however, often described the real Stroud as a dangerous and unrepentant sociopath with an I.Q. of 112. While the movie is a powerful "civil commitment"
In reality, Stroud was only allowed to keep birds while he was at Leavenworth Prison. By the time he was transferred to Alcatraz in 1942, he was forbidden from keeping any pets. Despite the harsh conditions of the penal system,