Northern Prairie Wildlife Research Center
Generally, American avocets and piping plovers prefer to nest on wide (≥75 feet) beaches located in alkaline wetlands. Beaches sought by these species are nearly free of vegetation but could include gravel or small stones. All of these are desirable species that do not consume waterfowl or other birds and they should be encouraged. Conversely, colonies of nesting California and ring-billed gulls on islands should be discouraged because these 2 large gulls prey on waterfowl, mainly ducklings, and other birds.