The RSPCA is appealing for information after a jogger found a snake dumped inside a pillow case on in St Neots.
The seven-foot long boa constrictor was found in bushes by a footpath in Riverside Park.
RSPCA inspector Stephen Reeves said: “Sadly this is not unusual for us to be called to collect an abandoned snake. We believe people are unaware of how much of a commitment these animals are, and once they grow in size they can no longer cope."
The snake has been taken to South Essex Wildlife Hospital for care and will remain there until a new home can be found.
Anyone with information as to who may own the snake or who may have seen anyone acting suspiciously is urged to call the RSPCA appeal line on 0300 123 8018.