Gull Ecology and Foraging Dynamics

Gulls occupy a pivotal role in coastal and urban ecosystems as generalist predators adept at exploiting both marine and terrestrial resources. Their ecology is shaped by the interplay of foraging strategies, energy budgets and habitat availability throughout the annual cycle. In breeding colonies, gulls often act as central‐place foragers, balancing the demands of chick provisioning with travel costs to diverse feeding grounds. Migration strategies vary from short‐distance movements to transcontinental journeys, yet behavioural adjustments such as timing of stopovers and choice of feeding habitats contribute more to annual energy expenditure than migration distance alone. Across life stages and colonies, age, natal origin and local resource distribution influence individual movement patterns, leading to population‐level plasticity. Urbanisation has created novel foraging opportunities in landfills, agricultural fields and refuse sites, resulting in shifts from marine to terrestrial diets and altered daily activity schedules in synchrony with human rhythms. These dynamics have far‐reaching implications for wildlife management, disease monitoring and urban planning, as gulls serve both as ecosystem indicators and vectors of anthropogenic impacts. Understanding the mechanisms underlying gull foraging behaviour and habitat selection is essential for mitigating human–wildlife conflict and conserving seabird populations under rapid environmental change.

Research from Nature Portfolio

Recent analyses of lesser black‐backed gulls have employed high‐resolution tracking and bioenergetics modelling to quantify energy expenditure and behavioural budgets across migration distances. Findings indicate that annual energy demands remain consistent regardless of travel distance, while deviations from average expenditure increase with longer migrations. Time‐activity budgets appear highly flexible, suggesting that fine‐scale foraging decisions contribute more to energy costs than broad migration strategy. Another study of urban‐nesting gulls combined GPS data with habitat mapping over multiple breeding seasons to reveal a growing reliance on suburban and urban areas. As chick development progressed, individuals spent increasing time foraging in built environments, demonstrating diverse tactics to exploit terrestrial resources and underlining the need for targeted management of urban gull populations.

Gull Ecology and Foraging Dynamics publication trend

The graph below shows the total number of articles in gull ecology and foraging dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Central‐place foraging: A strategy in which animals collect food and return to a fixed site (e.g. a nest) before resuming foraging.

Time‐activity budget: The allocation of time among different behaviours (foraging, resting, flying) over a set period.

Bioenergetics model: A quantitative tool to estimate energy expenditure based on behaviour, physiology and environmental conditions.

Site fidelity: The tendency of an individual to return to previously used foraging areas or breeding sites.

Niche swap theory: The hypothesis that one species can occupy an ecological role vacated by another seasonally or spatially.

References

1. Model-based prediction of a vacant summer niche in a subarctic urbanscape: A multi-year open access data analysis of a ‘niche swap’ by short-billed Gulls. Ecological Informatics (2023).
2. Energetic and behavioral consequences of migration: an empirical evaluation in the context of the full annual cycle. Scientific Reports (2023).
3. Natal colony influences age-specific movement patterns of the Yellow-legged gull (Larus michahellis). Movement Ecology (2023).
4. Habitat use of urban-nesting lesser black-backed gulls during the breeding season. Scientific Reports (2019).