St Albans City & District Council have issued an urgent reminder to not feed the birds in Verulamium Park after noticing damage to the habitat.
Park rangers have noticed an increase in feeding and its consequences over recent weeks despite notices asking visitors to not feed the birds.
By feeding the birds visitors are encouraging them to settle around the park rather than natural migration paths leading to overcrowding.
This in turn is damaging the park’s two artificial lakes, with foods such as bread causing digestion problems leading to an excess of bird droppings in already heavily silted lakes.
Councillor Anthony Rowlands, chair of the council’s public realm committee, said: “I fully understand that a small number of people think they are doing a good thing by feeding the birds.
“However, I am afraid it is simply attracting far more birds to this green space than it is designed to sustain
“It’s great that people want to explore this wonderful park and enjoy the outdoor life, but we would ask them not to feed the birds. It has caused a noticeable rise in the number of birds which the park just isn’t able to cope with.”