Annual winter floods bring spectacular flocks of wildfowl and waders. Lapwing and Golden Plover can number over a thousand whilst Teal, Widgeon and Canada Goose are often seen in their hundreds. Port Meadow is a magnet for migrating birds and almost every regularly occurring British species of wader and freshwater wildfowl has been recorded along with many Gulls, Terns, and song birds.
Port Meadow and Wolvercote Common are a Site of Special Scientific Interest (SSSI), a Scheduled Ancient Monument and together with the nearby Yarnton and Pixey Mead a Special Area of Conservation (SAC) under the European Habitats Directive.