It is generally the commonest tern in its range.
The Atlantic salmon, the herring gull and the common tern were found in both areas.
The first is the common tern, declared by New York State as threatened.
We saw no birds, apart from two very distant boobies and a common sooty tern.
It is also an important breeding area for common terns, and a feeding area for marsh harriers.
The common tern also frequents the area.
The islands are one of only four breeding colonies of common terns, a threatened species in Minnesota.
More than 12,000 of them live here, one of the largest colonies in the world for two species, the common and roseate terns.
Least and common terns feed here.
Arctic, sandwich and common terns are scattered across the islands, learning to fly and practicing fishing sorties.