| Introduction | 9 |
| Acknowledgements | 10 |
| Systematics and Taxonomy | 12 |
| Plumages and Topography | 16 |
| Behaviour and Evolution | 19 |
| Notes on the Species Accounts | 22 |
| Notes on the Colour Plates, Captions and Maps | 25 |
| Glossary | 26 |
| Colour Plates and Distribution Maps | 27 |
| Species Accounts | 107 |
| 1 | Casqued Oropendola: Psarocolius oseryi | 107 |
| 2 | Crested Oropendola: Psarocolius decumanus | 108 |
| 3 | Green Oropendola: Psarocolius viridis | 112 |
| 4 | Dusky-green Oropendola: Psarocolius atrovirens | 114 |
| 5 | Russet-backed Oropendola: Psarocolius angustifrons | 117 |
| 5X | 'Yellow-billed Oropendola': Psarocolius (angustifrons) alfredi | 119 |
| 6 | Chestnut-headed Oropendola: Psarocolius wagleri | 123 |
| 7 | Montezuma Oropendola: Psarocolius montezuma | 125 |
| 8 | Baudo Oropendola: Psarocolius cassini | 128 |
| 9 | Olive Oropendola: Psarocolius (bifasciatus?) yuracares | 129 |
| 10 | Para Oropendola: Psarocolius bifasciatus | 131 |
| 11 | Black Oropendola: Psarocolius guatimozinus | 132 |
| 12 | Band-tailed Oropendola: Ocyalus latirostris | 134 |
| 13 | Yellow-rumped Cacique: Cacicus cela | 136 |
| 14 | Red-rumped Cacique: Cacicus haemorrhous | 140 |
| 15 | Scarlet-rumped Cacique: Cacicus microrhynchus | 142 |
| 16 | Subtropical Cacique: Cacicus uropygialis | 144 |
| 17 | Golden-winged Cacique: Cacicus chrysopterus | 145 |
| 18 | Mountain Cacique: Cacicus chrysonotus | 147 |
| 19 | Selva Cacique: Cacicus koepckeae | 149 |
| 20 | Ecuadorian Cacique: Cacicus sclateri | 150 |
| 21 | Solitary Cacique: Cacicus solitarius | 151 |
| 22 | Yellow-winged Cacique: Cacicus melanicterus | 153 |
| 23 | Yellow-billed Cacique: Amblycercus holosericeus | 155 |
| 24 | Moriche Oriole: Icterus chrysocephalus | 157 |
| 25 | Epaulet Oriole: Icterus cayanensis | 159 |
| 26 | Yellow-backed Oriole: Icterus chrysater | 162 |
| 27 | Yellow Oriole: Icterus nigrogularis | 164 |
| 28 | Jamaican Oriole: Icterus leucopteryx | 167 |
| 29 | Orange Oriole: Icterus auratus | 169 |
| 30 | Yellow-tailed Oriole: Icterus mesomelas | 172 |
| 31 | Orange-crowned Oriole: Icterus auricapillus | 174 |
| 32 | White-edged Oriole: Icterus graceannae | 176 |
| 33 | Spot-breasted Oriole: Icterus pectoralis | 178 |
| 34 | Altamira Oriole: Icterus gularis | 181 |
| 35 | Streak-backed Oriole: Icterus pustulatus | 183 |
| 36 | Hooded Oriole: Icterus cucullatus | 189 |
| 37 | Troupial: Icterus icterus | 193 |
| 38 | Campo Troupial: Icterus jamaicaii | 196 |
| 39 | Orange-backed Troupial: Icterus croconotus | 197 |
| 40 | Baltimore Oriole: Icterus galbula | 199 |
| 40X | Hybrid Baltimore x Bullock's Orioles: Icterus galbula x bullockii | 2ä |
| 41 | Bullock's Oriole: Icterus bullockii | 206 |
| 42 | Black-backed Oriole: Icterus abeillei | 211 |
| 43 | Orchard Oriole: Icterus spurius | 213 |
| 43X | 'Fuerte's Oriole': lcterus spurius fuertesi | 217 |
| 44 | Black-vented Oriole: Icterus wagleri | 218 |
| 45 | Black-cowled Oriole: Icterus dominicensis | 221 |
| 46 | Montserrat Oriole: Icterus oberi | 226 |
| 47 | Martinique Oriole: Icterus bonana | 227 |
| 48 | St. Lucia Oriole: Icterus laudabilis | 229 |
| 49 | Audubon's Oriole: Icterus graduacauda | 231 |
| 50 | Bar-winged Oriole: Icterus maculialatus | 233 |
| 51 | Scott's Oriole: Icterus parisorum | 235 |
| 52 | Jamaican Blackbird: Nesopsar nigerrimus | 238 |
| 53 | Oriole Blackbird: Gymnomystax mexicanus | 240 |
| 54 | Yellow-headed Blackbird: Xanthocephalus xanthocephalus | 242 |
| 55 | Saffron-cowled Blackbird: Xanthopsar flavus | 245 |
| 56 | Pale-eyed Blackbird: Agelaius xanthophthalmus | 248 |
| 57 | Unicolored Blackbird: Agelaius cyanopus | 249 |
| 58 | Yellow-winged Blackbird: Agelaius thilius | 251 |
| 59 | Yellow-hooded Blackbird: Agelaius icterocephalus | 253 |
| 60 | Chestnut-capped Blackbird: Agelaius ruficapillus | 256 |
| 61 | Red-winged Blackbird: Agelaius phoeniceus | 258 |
| 61X | 'Bicolored Blackbird': Agelaius phoeniceus gubernator | 266 |
| 62 | Tricolored Blackbird: Agelaius tricolor | 269 |
| 63 | Tawny-shouldered Blackbird: Agelaius humeralis | 273 |
| 64 | Red-shouldered Blackbird: Agelaius assimilis | 275 |
| 65 | Yellow-shouldered Blackbird: Agelaius xanthomus | 277 |
| 66 | Red-breasted Blackbird: Sturnella militaris | 281 |
| 67 | White-browed Blackbird: Sturnella superciliaris | 284 |
| 68 | Peruvian Meadowlark: Sturnella bellicosa | 285 |
| 69 | Pampas Meadowlark: Sturnella defilippi | 287 |
| 70 | Long-tailed Meadowlark: Sturnella loyca | 290 |
| 71 | Eastern Meadowlark: Sturnella magna | 292 |
| 71X | 'Lilian's Meadowlark': Sturnella magna lilianae | 300 |
| 72 | Western Meadowlark: Sturnella neglecta | 302 |
| 73 | Yellow-rumped Marshbird: Pseudoleistes guirahuro | 306 |
| 74 | Brown-and-yellow Marshbird: Pseudoleistes virescens | 307 |
| 75 | Scarlet-headed Blackbird: Amblyramphus holosericeus | 309 |
| 76 | Red-bellied Grackle: Hypopyrrhus pyrohypogaster | 311 |
| 77 | Austral Blackbird: Curaeus curaeus | 312 |
| 78 | Forbes's Blackbird: Curaeus forbesi | 315 |
| 79 | Chopi Blackbird: Gnorimopsar chopi | 317 |
| 80 | Bolivian Blackbird: Oreopsar bolivianus | 320 |
| 81 | Velvet-fronted Grackle: Lampropsar tanagrinus | 322 |
| 82 | Tepui Mountain-Grackle: Macroagelaius imthurni | 323 |
| 83 | Colombian Mountain-Grackle: Macroagelaius subularis | 325 |
| 84 | Cuban Blackbird: Dives atroviolacea | 327 |
| 85 | Melodious Blackbird: Dives dives | 329 |
| 86 | Scrub Blackbird: Dives warszewiczi | 331 |
| 87 | Great-tailed Grackle: Quiscalus mexicanus | 333 |
| 88 | Boat-tailed Grackle: Quiscalus major | 338 |
| 89 | Slender-billed Grackle: Quiscalus palustris | 342 |
| 90 | Nicaraguan Grackle: Quiscalus nicaraguensis | 344 |
| 91 | Common Grackle: Quiscalus quiscula | 346 |
| 92 | Greater Antillean Grackle: Quiscalus niger | 350 |
| 93 | Carib Grackle: Quiscalus lugubris | 353 |
| 94 | Rusty Blackbird: Euphagus carolinus | 357 |
| 95 | Brewer's Blackbird: Euphagus cyanocephalus | 360 |
| 96 | Baywing (Cowbird) Molothrus (Agelaioides) badius | 364 |
| 96X | 'Pale Baywing': Agelaioides (Molothrus) badius fringillarius | 367 |
| 97 | Screaming Cowbird: Molothrus rufoaxillaris | 368 |
| 98 | Giant Cowbird: Scaphidura (Molothrus) oryzivora | 371 |
| 99 | Bronzed Cowbird: Molothrus aeneus | 374 |
| 100 | Bronze-brown Cowbird: Molothrus (aeneus) armenti | 378 |
| 101 | Brown-headed Cowbird: Molothrus ater | 380 |
| 102 | Shiny Cowbird: Molothrus bonariensis | 385 |
| 103 | Bobolink: Dolichonyx oryzivorus | 390 |
| Bibliography | 396 |
| Index | 427 |