Photographer Paul Mansfield, 44, captured the remarkable scene while on a day trip to London with his family. The pigeon had been pecking at crumbs in St James' Park, Westminster, when he was targeted by the pelican.
Mr Mansfield said: 'I noticed a small crowd gathered at the side of a lake that was 'oohing' and 'arghing'. 'On closer inspection I could see what all the fuss was about. On the grassy bank a pelican had managed to gobble up a pigeon.'
Mr Mansfield, from Brighton, East Sussex, added: 'The crowd was willing it to escape, with shouts of "Come on, you can do it!".'
'During one such moment the pigeon stood inside the peak, head peering out, with its body silhouetted on the pelican's pouch.
'There was another big gulp and you could see the pigeon slide further down the pouch. Then another and it was gone. There were gasps of disbelief from many in the crowd.'
Unbelievably the same pelican then gulped another bird nearby and the whole process started again. Mr Mansfield said: 'I had seen enough and headed for more pleasant vistas along the South Bank.'
Source: MailOnline