. Birds of village and field: a bird book for beginners . clesmore than other Swallows. Rough-winged Swallow : Stelgidopteryx serripennis. Sooty brown above; breast uniform light sooty. Length, 5jinches. Geographic Distribution. — North America; breeds as farnorth as British Columbia, Minnesota, and Connecticut; win-ters in the tropics. The Rough-winged Swallow gets its name fromthe small, recurved booklets set like the teeth of asaw along the edge ofthe outside feathers ofthe wing in the may be mistakenfor the Bank Swallow,unless it is rememberedthat the Bank Swallowhas a dark band ac
. Birds of village and field: a bird book for beginners . clesmore than other Swallows. Rough-winged Swallow : Stelgidopteryx serripennis. Sooty brown above; breast uniform light sooty. Length, 5jinches. Geographic Distribution. — North America; breeds as farnorth as British Columbia, Minnesota, and Connecticut; win-ters in the tropics. The Rough-winged Swallow gets its name fromthe small, recurved booklets set like the teeth of asaw along the edge ofthe outside feathers ofthe wing in the may be mistakenfor the Bank Swallow,unless it is rememberedthat the Bank Swallowhas a dark band acrossthe breast (Fig. 24, ). The nesting hab-its of the two also Eough-winged does not build in colonies likethe Bank, but usually nests in isolated pairs inholes in sand-banks, stone ruins, culverts, andabutments. Near Washington, in the stone wallsof the canal, it is particularly abundant. Whenmade in sand, the entrance to the burrow is saidto be round rather than elliptical, as the BankSwallows is, and the burrow itself is there s^en-. FiG. 123. Rough-winged Swallow. 196 KEY TO SWALLOWS erally a deserted Kingfislier hole or other suitablecavity. An interesting article on the Rough-wingeds nesting habits, by Walter Van Fleet, isto be found in the Bulletin of the Nuttall Orni-thological Club, vol. i. No. i. p. 9. Looking back over the Swallows we havespoken of, it becomes an easy matter to distin-guish them. The Barn is known by its longforked tail (see Plate IV. p. 50) ; the Cliff orEave by its light, buffy rump and its gourd-shaj^ed nest (see Fig. 22, p. 52); the Purj^leMartin by its uniformly blue-black body; theTree or AYhite-bellied by its shining white breast(see Fig. 122, p. 194) ; the Bank by the darkband across its breast (see Fig. 24, p. 55) ; andthe Rough-wing by its sooty back and lack ofdistinguishing breast-marks. Key to Adult Male Swallows. Common Characters. — Birds of the air, wliich catch theirinsect prey on the wing in theirwidely gaping bi
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