All of the islands have decent mudflats for shorebirds when the tide isn't high. But when the tide is high (which is the best time for kayaking is you don't want to strand) birds roost on all of the islands and patrol their rocky perimeters looking for food. Spotted Sandpipers are a common sight bobbing along on the rocks. Photographic opportunities abound for the cormorants and for the gulls; mainly Herring and Great Black-backed which nest on the islands. The oystercatchers are also fairly easy to approach and with some luck the few migratory shorebirds are also.
Black-crowned Night-Herons can sometimes be photographed from a kayak on Sarah Island. The egret nests are often not visible from the water, but the adults can be seen flying back and forth.