The pair that nested in the western portion of the island fed along the sand fill or along the bases of the marsh-elder.
The marsh-elder bushes mostly are restricted to the mounds of earth dug from the ditches.
The Seaside Sparrow nests in marsh-elder bushes, or in areas of mixed vegetation.
The female crawled about in a marsh-elder bush seemingly testing the various forks in the branches for size.
Four nests were supported by marsh-elder bushes, three of which were dead.
These were nests built in marsh-elder bushes where the grass stems were held upright by the branches of the bushes.