. The Canadian field-naturalist. Natural history. 104 The Canadian Field-Naturalist [Vol. XXXIV. largest alsc had feathers of this plumage all across the breast and in the tail. Most of the young which are old enough to do so hide among ferns, bushes, grass, or rocks when the old birds leave an island at the approach of an intruder, but a few enter the water and swim rapidly away for a little distance. They are good swimmers, but can be overtaken easily by a rowboat. Those which hide usually remain quiet until they believe they are discovered, when they try to run, but they are slow and clumsy
. The Canadian field-naturalist. Natural history. 104 The Canadian Field-Naturalist [Vol. XXXIV. largest alsc had feathers of this plumage all across the breast and in the tail. Most of the young which are old enough to do so hide among ferns, bushes, grass, or rocks when the old birds leave an island at the approach of an intruder, but a few enter the water and swim rapidly away for a little distance. They are good swimmers, but can be overtaken easily by a rowboat. Those which hide usually remain quiet until they believe they are discovered, when they try to run, but they are slow and clumsy runners. Gulls were the Black Duck (Anas rubripes), Spot- ted Sandpiper (Actitis macularia). Ruby-throated Hummingbird (Archilochus colubris), Purple Finch (Carpodacus purpureas purpureus). Song Sparrow (M^iospiza melodia melodia). Yellow Warbler (Dendroica aestiva aestiva), and Mary- land Yellow-throat (Ceoihlypis trichas trichas). The colony of Gulls was first shown to me in June, 1912, by Mr. E. C. Allen, now of Halifax, , who has given a brief account of it in his "Annotated List of Birds of Yarmouth and Vi-. TIIK :—A GUKAT BLACK-BACKKI) GULL CALLIXC AT LAKK GKOIUilO. I'lioto by Howard H. Cleaves: reiiroduced by permission—("ut !>>• courtesy of I i(]miiiiiiii Pai'ks I'l'aiioli. On the gentle slopes of the islands the nests are mere hollows in the earth, generally with some lin- ing of sticks and dead grass or Usnea lichen. Nests which are placed on piles of large boulders are much more substantial, as the character of the site necessitates, and are solidly built of grass, sticks, and rubbish. In some cases I noticed that the grass was still green. In one instance only did I find a nest lined with down, and, as that was on Round Island, it was probably a Herring Gull's nest. Other birds observed on the islands used by the cinity. Southwestern Nova Scotia" (Trans. Inst, of Sci., Vol. XIV, Part 1, pp. 67-95, Jan. 5. 1916). A mont
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