A pensioner who claimed nearly £90,000 in disability benefits was filmed delivering catalogues and carrying 25kg bags of bird seed.
Graham Branfield, 76, claimed £62,000 in Disability Living Allowance (DLA) and £25,000 in pension credit over 10 years.
A former neighbour, Helen Gillespie, told Bristol Crown Court he was also a regular dog walker and would shop at Morrisons and carry items without difficulty.
Branfield denied fraudulently claiming the payments, but a jury convicted him after deliberating for 90 minutes on December 19.
Retired shopkeeper Brian Sheehan, who runs Fur and Feathers in Knowle, also gave evidence during the trial.
He said Branfield regularly purchased heavy bags of wild bird seed and pigeon corn from him two or three times a week.
He said the pensioner would park his car near the premises before carrying 20kg or 25kg bags to it without difficulty.
Ultimately, Department of Works and Pensions (DWP) staff tailed Branfield as he went on one of his regular shopping runs, and captured evidence on camera.
Branfield, who had an interest in feeding wild birds, said he was suffering from a plethora of debilitating ailments for which he was medicated but he was still able to move around in pain.
He also admitted to a small amount of catalogue work, for which he said he drove, reports Bristol Live .
On December 19, Judge James Patrick jailed Branfield for two years, to run extra to a four-year term he is serving for breaching a Sexual Harm Prevention Order.
The judge said: "This was a simply breath-taking piece of dishonesty.
"You are an intelligent man and a man with some charm.
"But you are a manipulative man.
"Your application may have been honest from the beginning but you saw it as a blank cheque.
"You received very large sums of money indeed."
The jury heard interviews Branfield gave in early 2016 during an investigation into alleged benefit fraud.
He said he had claimed DLA as he was suffering a lot and took pain medication.
Branfield said he suffered from a joint and muscle problem, renal problems and incontinence.
He said medication gave him the chance to be mobile but he was still in a lot of pain when moving and it had not got any better in the past 10 years.
He said he could not walk even small distances without pain.
He added a doctor had advised him Betterware catalogue work and feeding birds were giving him something to live for.
Branfield agreed he would leave home every day at 6am or 7am to feed pigeons and foxes unless he felt too unwell to go.
He maintained walking around did not stop him from suffering severe discomfort and he spent a lot of time indoors, lying on his bed, as he had difficulty coping.
A DWP spokesman said: "Benefit fraud is a crime that diverts money from those who really need it. In addition to any sentence imposed by the court, people must pay back all the money they falsely obtained.
"We have zero tolerance of anyone fraudulently claiming benefits and will take swift action to investigate, supporting our partners and prosecutors to bring them to justice.”
