People have taken to putting up umbrellas as they enter a church to protect themselves from bird droppings.
About 200 kittiwakes have made their home on the tower of Our Lady Star of the Sea, in Lowestoft, Suffolk.
Deacon Steve Pomeroy said some find the protected species a nuisance, but he considered them a "blessing".
The church has been burning more incense to cover the smell of the droppings outside - "being Catholics, we love our incense", he said.
The birds arrived about five years ago, the deacon said.
"It was a small colony of about 100, but they've found it more and more to their liking," he added.