. The Canadian field-naturalist. 136 The Canadian Field-Naturalist Vol. 85. Figure 4. Brackish non-tidal areas are used by many ducks, Double-crested Cormorants, Great Blue Herons, Bald Eagles, and Ospreys, but few passerines. Delta of Middle River at Nyanza. with these communities and that of the running water areas. Among the raptors (Table 4). only the Bald Eagle Haliaetus leucocephalus and Osprey Pandion haliaetus are associated with water. The eagle was seen near all water areas except the upper reaches of rivers flow- ing from the Highlands, but it was most frequent around the mouths and
. The Canadian field-naturalist. 136 The Canadian Field-Naturalist Vol. 85. Figure 4. Brackish non-tidal areas are used by many ducks, Double-crested Cormorants, Great Blue Herons, Bald Eagles, and Ospreys, but few passerines. Delta of Middle River at Nyanza. with these communities and that of the running water areas. Among the raptors (Table 4). only the Bald Eagle Haliaetus leucocephalus and Osprey Pandion haliaetus are associated with water. The eagle was seen near all water areas except the upper reaches of rivers flow- ing from the Highlands, but it was most frequent around the mouths and lower reaches of rivers. The Osprey was generally less com- mon, particularly in the west coast areas (Judi- que, mabou, Margaree Harbour), but it reached peak frequencies in the same areas as the eagle. The other non-passerines (Table 5) include only one "water follower", the Belted Kingfisher Megaceryle alcyon which was nearly ubiquitous in the areas studied. Its highest frequencies were found along the lower reaches of rivers, where it nests commonly in the cut-banks. Few of the passerines (Table 6) were clearly associated with water, but Traill's Flycatcher Empidonax traillii. Bank Swallow Riparia rip- aria, Yellow Warbler Dendroica petechia. Northern Waterthrush Seiurus noveboracensis, Yellowthroat Geothlypis trichas, Sharp-tailed Sparrow Ammospiza caudacuta, and Swamp Sparrow Melospiza georgiana were regularly found near water. The Redwinged Blackbird and Common Crackle, among passerine species not included in Table 6, also belong to the wet- land bird communities. Among these, only the Sharp-tailed Sparrow was restricted to the brackish water areas. The Yellowthroat and Swamp Sparrow (probably also Traill's Fly- catcher and Redwinged Blackbird) were much more frequent in all standing water areas, fresh as well as brackish, than along rivers. The Yellow Warbler and the waterthrush were the only species found along the upper courses of rivers, with the latter sp
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