The number of pigeons in Norwich has almost reached "epidemic" proportions, new research has revealed.
Experts from the Pigeon Control Advisory Service (PCAS) estimate that there are currently about 2,500 nesting feral pigeons within the city centre.
The city council is concerned that the birds could pose a health and safety problem for the public.
A council spokeswoman said they hoped to avoid a cull but were asking the public not to feed the birds.
PCAS has recommended the use of non-lethal methods of controlling pigeons, which includes using metal spikes and netting on buildings.
But members of the public should be advised pigeons could find food without their help, PCAS said.
The council's Diana Lowe said: "I would like to ask the public to stop feeding the pigeons and to carefully dispose of litter to enable us to effectively employ non-lethal methods to control the pigeon population."
The city council commissioned the survey after an increasing number of complaints from the public.