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MATERIALS AND METHODS
Summary of geographic data on visited
ALARM CALLS WHISTLES
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1A Tyuuu alarm calls alert call-types alert calls Auburn audiospectrograph Barr Barrington Belgrade bird Borror bout central New York Chaffinch Chnk Dawn Calling dialects distinct doublet-II drum speed ending frequency Examples of Group Examples of whistle-type frequency modulation geographic variation Gilman Pond harmonic heard individual male Lansing listing unit Lond Londonderry male Cut male Red-winged Blackbirds male Redwings Marler Mass modulation rate North Amherst North Yarmouth playback Recorded from male Redwing vocalizations Redwing whistles repertoire of male repertoire sizes SECONDS 0.0 See-ay See-u shown in Plate Si-eee significant similar whistles simple random sample Song repertoire Song-element type song-types song-versions South Corning species spectrograms Table Taghkanic tape Tchet Tchih Tchit Tchunk territorial male territorial songs Teww total duration trill type 14 type 2 whistles type 20 uttered versions vocalization-types whistles were recorded White-crowned Sparrow Wolcott Wolcott V-l Yarm Zee-ee Zee-yer