Rangers at Bradgate Park are urging visitors to use on-site bins or take litter home after a cygnet was found with string caught around its beak and foot, making it unable to eat.
The Trust says the rangers managed to catch the cygnet and remove the string.
On a Facebook post the Bradgate Park Trust said: "This cygnet was found with string caught around it's beak and foot making it unable to eat.
"Fortunately our rangers managed to catch it and remove the string.
"We urge visitors to use our on site bins or take litter home.
"Please take care of the park and its wildlife and do not litter."
LOROS will make improvements to main hospice building with Government cash
New snow leopard moves into Twycross Zoo
East Midlands Airport fined nearly £900,000 for environmental pollution
Six-year-old patient has behind-the-scenes lab tour at the Leicester Royal Infirmary
Four Leicestershire country parks awarded prestigious Green Flag
Over £70,000 awarded to projects in Charnwood
Some Leicestershire buses will be free on weekends in August
