Gulls’ Diverse Diets Reflect Changing Coastal Ecosystems

Gulls are known for their insatiable appetites, from pilfering chips to swallowing whole starfish. However, a recent citizen science project launched by University of Salford ecologist Dr. Alice Risely is shedding light on how gulls’ diets are evolving in response to environmental pressures.

The Evolution of Gulls’ Diets

Risely was inspired to start the “Gulls Eating Stuff” project after seeing odd images of gulls consuming unusual foods on social media. The initiative encourages people to upload their photos of gulls feasting on various items, from half-eaten sandwiches to starfish and even baby puffins.

By analyzing these images, researchers hope to gain insights into changes in gulls’ behavior, their role in ecosystems, and the pressures they face in a rapidly changing world.

Gulls Under Threat

Seabird populations, including gulls, face significant threats such as warming oceans, overfishing, and avian flu. Gull numbers have been on the decline, with several species listed on the UK’s red list of conservation concern. These species include the great black-backed gull, the common gull, and the herring gull.

Adapting to Urban Environments

Some gulls are moving closer to urban areas where human leftovers can supplement their natural diet, which comprises fish, crabs, starfish, and earthworms. These birds may be forced to switch to human-provided food sources to feed their chicks during breeding season or as natural food supplies dwindle.

Gill Stafford

The extent to which gulls switch to human-provided food sources is still unclear. Risely hopes that contributions from the public will help fill in the gaps in current data.

Strange and Wonderful Foods

The project has amassed a variety of intriguing images showing gulls consuming unusual items. One striking photograph taken by Samuel Schmidt on the Farne Islands in Northumberland shows a gull eating a baby puffin. Schmidt emphasized that the gull was merely hungry, not malicious.

Predation and Competition

Gulls are known predators of other birds, including pigeons. Their ability to adapt their diet by consuming a wide range of foods underscores their resilience in the face of environmental changes. However, increased predation can also impact populations of other bird species.

Getty Images

Three Gull Species on the Red List

Three gull species in the UK are currently listed on the red list of conservation concern due to declining populations:

• The great black-backed gull, characterized by its black wings and powerful beak, nests along coasts, clifftops, rooftops, and islands.
• The common gull, a medium-sized bird, nests around lakes in the north of England and Scotland.
• The grey-backed and pink-legged herring gull.

Samuel Schmidt/CitSci

The Role of Citizen Science

Citizen science projects like “Gulls Eating Stuff” play a crucial role in gathering valuable data on wildlife behavior. Contributions from the public can help researchers better understand how gulls are adapting to changes in their environments and the various pressures they face.

Getty Images

Conservation Efforts

Understanding these diet shifts is essential for developing effective conservation strategies. By monitoring gulls and their interactions with human and natural environments, researchers can inform policies aimed at protecting these birds and their ecosystems.

Get Involved

Join the “Gulls Eating Stuff” project and contribute your own photos of gulls consuming various foods. Your contributions can provide valuable insights into how these adaptable birds are coping with environmental changes.

Your participation can help researchers better understand the complex relationship between gulls and their changing environments. Together, we can work towards more effective conservation efforts for these iconic coastal birds.