The most common is that their nests are under threat. Parent gulls are understandably protective over their offspring and their specially-built nests. They will make as much noise as possible to ward off potential predators - whether they are human or other birds.

Why do seagulls scream at night?

The wholesome answer: gull-duation

"What seems to happen this time of year is the large chicks have started to leave their nest and fly around," said Jones. "When they do that, it's associated with the adult birds getting very excited, and then giving these loud calls."

Why are seagulls so noisy at 4am?

Herring gulls are also very protective of their offspring, so if they feel threatened by a human they will make “a lot of noise to scare off potential predators”, said Hatch. Like most birds, gulls are governed by daylight, which is why they are often heard very early in the morning.