An eagle owl was recaptured after escaping from its nest at Liverpool Prison and getting tangled up in the nearby suburb of Old Swan.
Boris has now been returned, unharmed, to his prison keepers
A member of the public raised the alarm after spotting the bird of prey on the TV aerial of a house in Gidlow Road South on Tuesday morning.
An RSPCA officer and a firefighter used a ladder to reach the roof and netted the six-month-old, called Boris.
Boris was unharmed by his ordeal and has been reunited with his keepers.
A Merseyside Fire Service spokeswoman said the bird had escaped from HMP Liverpool, where it is kept to hunt pigeons and rodents.
Boris was unable to move from the aerial because his jesses were entangled on the metal frame.
An RSPCA spokeswoman said jesses were the two leather straps that hang from the owl's feet, allowing falconers to handle them.
The rescue was carried out by firefighters providing emergency cover for striking colleagues at Old Swan Fire Station.