Salmon, 29 Sanderling, 11, 27 Sandpiper, 15, 27 Bartramian, 15 purple, 42 Sapsucker, Williamson's, 72 Scaup, 58 Scoter, 63 white-winged, 59, 65 Segregation, 31 Shore bird, 9, 11, 12, 32, 33, 38, 42, 48, 50, 55, 57, 60, 61 Short and undetermined migrations, 34 Shrike, 19, 34 loggerhead, 37 Snipe, 15 Wilson's, 37 Snowbird, 10 Sora, 79 Southern ancestral home theory, 8 Sparrow, 15, 31, 32, 34, 60, 76, 77 chipping, 37, 70 field, 37 fox, 35, 36 (map) Harris's, 43 (map), 44, 45 Ipswich, 43 song, 33, 34 swamp, 75 tree, 34, 37, 75 vesper, 37 white-throated, 75, 84 Species, movements of, 12 Speed, flight, 18 migration, 18 Starling, 4 Stork, 2, 4, 6, 27 Storms, 75 Swallow, 2, 4, 6, 9, 17, 18, 26, 32, 34, 57 bank, 55 barn, 20, 38, 60 cliff, 16, 17 (map), 26, 38 hibernating, 4 Swan, 4 Swift, 4, 16, 19, 20, 34 chimney, 4, 32 Tanager, 55, 66 scarlet, 33, 44 (map), 45 western, 65 (map), 66, 67 (map) Teal, blue-winged, 20, 55, 58, 60 Tern, arctic, 11, 38, 39 (map), 40, 41, 68 common, 40 Forster's, 40 noddy, 30 sooty, 30 Theories of migration, 7 Thrush, 4, 15, 19, 21, 27, 31, 38, 60, 77 gray-cheeked, 21, 23 (map), 55 hermit, 75 wood, 55 Titlark, 73 Titmouse, 34 tufted, 82 Transmutation, 5 Turd us migratorius, 35 Turnstone, 11 Turtle [dove], 2, 6 Vagrant migration, 73 Variable migrations within species, 35 Vertical migration, 72 Vireo, 15, 55, 75, 77 red-eyed, 69 (map), 70 Vulture, 26 turkey, 34 Warbler, 15, 17, 18, 27, 60, 75, 76 black and white, 12, 13 (map), 14 (map) blackpolled, 16, 18, 24, 25 (map), 55, 60, 70 black-throated blue, 14 Cape May, 37 golden-winged, 63 Kentucky, 63 myrtle, 61, 70 palm, 37 pine, 37 summer, 21 wood, 31, 32 worm-eating, 63 yellow, 14, 21, 70 Waterfowl, 20, 47, 55, 58, 59, 61, 64,93 Waxwing, 32, 33 Bohemian, 12, 74 Weather, influence of, 80 Wheatear, Greenland, 11 Widgeon, 55 American, 62 Woodcock, 37 Woodpecker, 34 Wren, 15 Carolina, 34, 82, 83 long-billed marsh, 33 rock, 37 winter, 34, 75 Wrentit, 82 Yeagley, Henry L., 30 Yellowlegs, lesser, 21 Yellowthroat, Maryland, 35, 78 * * * * * Transcriber Note Illustrations moved to prevent splitting paragraphs. Minor typos corrected.