Two boys armed with a cricket bat beat a seagull to death as it staggered around 'drunk' after eating too many flying ants.
The bird was so badly hurt by the vicious thugs that it was coughing up blood as it tried to hop away from the young attackers, close to Brighton seafront.
The Sussex resort is said to be one of many where tourists and residents claim hungry gulls swoop down to grab sandwiches on the promenade.
Lisa Barrow, 53, who took the seagull to New Priory Vets in Brighton, said: "Apparently the seagull had been beaten by two boys in Wish Park in Hove.
"It was trying to get away and coughing up blood. It's just awful."
Pete Foggen, a veterinary nurse confirmed the bird was reported to have been viciously attacked.
"A call came in about a gull which had been attacked by two youths with a bat.
"Due to social distancing measures the box with the bird was left at our door, and we took it from there.
"It arrived bleeding from its wing and on examination it was found to have an open fracture to its right wing and had lost a lot of blood.
"Sadly it was euthanised on humane grounds."
Pete said a lot of seagulls had been brought to the vets after eating flying ants.
The insects, which form huge swarms at this time of year, can make the gulls 'drunk' and unable to walk or fly and therefore potentially an easy target.
Pete said "We're not sure if it was because this gull was grounded and they just thought they would hit it.
"I see a lot of animals with injuries and we try to rehabilitate them if possible, but the nature of this one was a shock and was never going to be a viable option to fix.
"What makes it worse is the fact it could have young somewhere, which now may die also."
On the same day, Pete had to attend to 14 pigeons, including nestlings, fledglings, and an adult, plus eight eggs, which had been sealed in a box and dumped beside a communal bin in Salisbury Road in Hove.
"I must say, we weren't expecting 20 birds, crammed in a box so hot that when opened the stench of hot steamy faeces bellows out like a sauna."
He painstakingly cleaned and fed each bird and they were taken to Sompting Wildlife Rescue.
He has reported the offence to police, as it is illegal to intentionally disturb or destroy the active nest of any wild bird.
"From the size of the colony we have, there are some five different stages of bird here that have been removed, and that means there are at least another 20 to 30 adults somewhere now, minus their offspring.
"This is not a pair of pigeons nesting on a balcony, but more like a rooftop on a block of flats or a shop front signage that someone can get to.
"If anyone has any information on this matter please contact police on 101."
