Urban Gull Surveys 2020 Project (Lot 3 off ES Framework)

Background Gulls, particularly herring and lesser black-backed gulls, have expanded their breeding distribution into urban areas, and present a problem for survey and monitoring. The current seabird census, Seabirds Count, uses a 1 km sample square design to estimate nesting gull abundance and distribution within a representative sample of urban habitats. These 1 km squares are used to model and estimate abundance at wider spatial scales, based on habitat availability. In England, we have about 3,800 1 km urban squ...