RSPCA Cymru says the incident is a timely reminder about the risks fishing litter poses to wild animals if not disposed of appropriately.
Animal welfare officer Paula Milton said: “We’re so relieved it was a happy ending for this heron – and we’re so grateful to the dedication and commitment of firefighters in supporting the rescue of this bird, as well as our friends at Gower Bird Hospital for providing much needed care.
“This case is a reminder that fishing litter poses so many problems for Wales’ wildlife. Fishing line had trapped this heron and left him hanging upside-down from his wing, in what must have been a terrifying and painful ordeal.
“Clearly, this incident was totally avoidable if the fishing line had been disposed of properly. We know most anglers are very responsible and deal with their litter – but sadly one careless act like this can endanger the life of an animal.”