A duck featured in a clip being put into a carrier bag in a Sydney park is dead.

Footage emerged on Sunday appearing to show a man taking a wild duck from the Camellia Gardens park, in Caringbah South, Sydney, on Saturday and place it into a bag held open by a boy.

Dr Jacqueline Bell, from Cronulla Veterinary Clinic reports that the duck was euthanised after was handed in on Saturday afternoon as wildlife.

However, the duck's alleged owner contacted police to say the duck was his pet and he'd taken it to the park to socialise with other birds 'because it was feeling unwell'.

A man was filmed scooping up a duck and appearing to place him into a plastic bag as his young son held it open

NSW Police said the duck, named Yaya according to the Daily Telegraph, was a pet, taken to the park by his owners.

‘The duck was sick so they took it to the park to socialise it with other ducks and have a swim,’ a police spokesman said.

He added that they duck remained unwell after his outing, so the family took it to the Cronulla Veterinary Clinic in Sydney.

However, Cronulla Veterinary Clinic have confirmed that 'Yaya' the duck has been euthanised after suffering from 'swollen hocks'.

'We were handed the duck as wildlife,' Dr Bell said.

'The person came in and said the he found the duck at the park. After an x-ray we found the duck was suffering with swollen hocks so we gave him anti-biotics and pain relief.'

The duck's health saw no improvement since Saturday and it was in a lot of pain said Dr Bell, so they made the decision to euthanise on Monday morning.

'If it was someones pet, it should have been brought in a lot sooner,' she said.

Police visited Cronulla Veterinary Clinic on Monday morning to investigate further, arriving after Yaya was euthanised.

Police said the duck remained unwell after his outing, so the family took it to a veterinary clinic in Cronulla where it was euthanised on Monday morning

The video came to the attention of the ducks owner who approached NSW Police to assure the duck was alright

The clip initially caused outrage online over the welfare of the duck with some reporting it to the RSPCA.

'This situation is not uncommon,' an RSPCA spokesman said to Daily Mail Australia.

'We often have reports of people going to parks and removing birds like pigeons or ducks.

The ducks are a popular attraction at Camellia Gardens, with visitors allowed to feed the birds and even buy duck food from the nearby tea house.

A staff member of a nearby tea house initially believed the duck was taken and then returned but was unwilling to comment further on the matter.

Ducks are a popular attraction at Camellia Garden, with visitors allowed to feed the birds and even buy duck food from the nearby tea house. Above, photographs of others at the site posted by other visitors