I am working on a diversity of ecological aspects relating to birds, but my core interests are environmental and anthropogenic effects on birds, terrestrial as well as seabirds. During the last 15 years I have answered questions about how climate change and other anthropogenic factors affect bird populations and bird migration. More recently, my focus is on effects of onshore and offshore wind power development on seabirds and migratory birds of other species groups. Bird migration is one of my core interests. Due to my interest in anthropogenic effects on birds, I also work with effects of human disturbance on gulls, urbanisation effects on gulls, and nature restoration of wetlands as well as seabird breeding areas.