Cardiff Council have issued a warning to people feeding the birds in the city.
Writing on their Facebook page, they warned residents that if bird seed is left on the streets they will face a fine of £100.
They wrote: "Feed the birds, tuppence a bag...?
"Please just make sure that birds are present at the time of feeding or that bag could cost you a £100 fine."
Some people did not respond well to the post.
Ollie Richards wrote: "Jesus. I'm glad I left Cardiff. All the other problems and they worry about...bird feed!"
Matt Harley added: "Out of all the photo ops and publicity you chose bird seed. Seriously sort yourselves out."
Agreeing, Sam Ryan agreed: "A fine for discarded bird seed... come on CC. Theres littering and theres littering."
However there were two sides to the debate. The council are currently running a campaign against litter and fly tipping and there is public support to tackle the issue.
At the start of the month, residents woke to found a pile of apparentl fly-tipped furniture outside City Hall as part of the council's Beware of the Waste Cowboys campaign.
Weighing into the debate, Gordon Pedel said: "Pigeons are vermin just like rats. It is about time this is stopped, trouble is it's not just pigeons that are feeding on this but seagulls. left to there own devices pigeons will start dive bombing for food just like seagulls do."
Merah Koonalla also believed that left over bird seed is an issue.
She said: "I saw rats regularly feasting on excess birdseed in local park."
The RSPB wanted the council to encourage more people to engage with nature.
Speaking to the BBC a spokeswoman said: "For many of us feeding the birds is our first memory of interacting with nature in the wild.
"This experience can be an important step towards understanding our natural world and appreciating that we all play a role in caring for it."
Cardiff Council has added in a statement that enforcement officers would always speak to the person first about the issue and a fine would be issued "only if further and repeated incidents were witnessed".
