Duck feeders at River Green in Thorpe St Andrew have been reminded to throw feed into the water and not on the ground.
Around �750 worth of crocuses, daffodils and snowdrops were planted for Thorpe St Andrew Town Council in the autumn but have been decimated by birds.
The town council's amenities officer, Darrin Sayer, said: 'The cause of the birds eating the bulbs is due to their large numbers and that over the winter they have placed so much stress on the grass that there has been little new growth for them to eat.
'Because they are fed constantly with rubbish every day they have no need to move on to other areas to forage for food but it is in their nature to continue to forage.'
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