• Tachybaptes dominicus, ii. 205.
• Tachycineta leucorrhoa, i. 30, 32.
• Tachyeres cinereus, ii. 137.
• Tachytriorchis albicaudatus, ii. 61.
• Tænioptera coronata, i. 115, 118, 119.
• —— dominicana, i. 117, 119.
• —— icterophrys, i. 125.
• —— irupero, i. 115, 118.
• —— mœsta, i. 118.
• —— murina, i. 119.
• —— nengeta, i. 114.
• —— rubetra, i. 114, 120.
• —— suiriri, i. 146.
• —— variegata, i. 113.
• Talpacoti Dove, ii. 144.
• Tanager, Azara’s, i. 40.
• ——, Black-necked, i. 37.
• ——, Blue, i. 39.
• ——, Blue-and-Yellow, i. 39.
• ——, Dark-backed, i. 37.
• ——, D’Orbigny’s, i. 41.
• ——, Four-coloured, i. 40.
• ——, Purple-and-Yellow, i. 37.
• ——, Red-capped, i. 40.
• ——, White-capped, i. 38.
• ——, Yellow-striped, i. 41.
• Tanagra bonariensis, i. 39.
• —— cyanoptera, i. 39.
• —— sayaca, i. 39.
• —— striata, i. 39.
• Tantalus loculator, ii. 108.
• Tapacola, White-necked, i. 207.
• Tataupa Tinamou, ii. 208.
• Teal, Blue-winged, ii. 130.
• ——, Brazilian, ii. 133.
• ——, Grey, ii. 131.
• ——, Ring-necked, ii. 132.
• ——, Yellow-billed, ii. 131.
• Tern, Cassin’s, ii. 196.
• ——, Eyebrowed, ii. 197.
• ——, Great, ii. 195.
• ——, Great-billed, ii. 194.
• ——, Trudeau’s, ii. 195.
• Tero-tero, ii. 195.
• Téru-real, ii. 179.
• Téru-réru, ii. 80.
• —— del campo, ii. 79.
• Téru-téru, ii. 166.
• Thamnophilus argentinus, i. 204.
• —— cærulescens, i. 204.
• —— leachi, i. 202.
• —— major, i. 203.
• —— ruficapillus, i. 204.
• —— stagurus, i. 203.
• Thaumatias albicollis, ii. 7.
• Theristicus caudatus, ii. 110.
• —— melanops, ii. 110.
• Thickbill, Black-and-Yellow, i. 43.
• Thick-billed Grebe, ii. 206.
• Thinocorus orbignyanus, ii. 178.
• Thinocorus rumicivorus, ii. 176.
• Thin-tailed Tyrant, i. 138.
• Thlypopsis ruficeps, i. 40.
• Thorn-bird, Red, i. 194.
• ——, Red-fronted, i. 192.
• ——, Red-winged, i. 194.
• ——, Whistling, i. 192.
• Thrush, Black-headed, i. 4.
• ——, Dusky, i. 1.
• ——, Magellanic, i. 3.
• ——, Red-bellied i. 3.
• Tiger-Bittern, Marbled, ii. 104.
• Tigrisoma brasiliense, ii. 104, 105.
• —— fasciatum, ii. 104, 105.
• —— marmoratum, ii. 104.
• Tijereta, i. 160.
• Tinamou, Brown, ii. 207.
• ——, Cinereous, ii. 210.
• ——, Darwin’s, ii. 213.
• ——, Great, ii. 209.
• ——, Martineta, ii. 214.
• ——, Pentland’s, ii. 210.
• ——, Spotted, ii. 211.
• ——, Tataupa, ii. 208.
• Tinnunculus cinnamominus, ii. 69, 70, 77.
• —— sparverius, ii. 69.
• Tiru-riru, i. 189.
• —— del campo, i. 187.
• Tit-like Spine-tail, i. 177.
• —— Tyrant, i. 141.
• Tit-Tyrant, Yellow-billed, i. 142.
• Toco Toucan, ii. 40.
• Todirostrum margaritaceiventor, i. 136.
• Torcasa, ii. 141.
• Tordo, i. 72.
• —— Comun, i. 72.
• —— negro cabeza roxa, i. 101.
• —— pardo roxiso, i. 96.
• Tortola, ii. 141.
• Tortolita, ii. 143.
• Totanus bartramia, ii. 189.
• —— chilensis, ii. 186.
• —— flavipes, ii. 187.
• —— melanoleucus, ii. 25, 186, 187.
• —— solitarius, ii. 188.
• Toucan, Toco, ii. 40.
• Trarú, ii. 82.
• Tree-Duck, Fulvous, ii. 126.
• ——, White-faced, ii. 128.
• Tree-Martin, i. 26.
• Trepador comun, i. 202.
• Triceus margaritiventro, i. 136.
• Trichothraupis quadricolor, i. 40.
• Tringa acuminata pectoralis, ii. 183.
• —— arenaria, ii. 186.
• —— bairdi, ii. 184.
• —— bonapartii, ii. 185.
• —— dorsalis, ii. 184.
• —— fuscicollis, ii. 185.
• —— maculata, ii. 183.
• —— rufescens, ii. 190.
• —— rufus, i. 82.
• Trochilus colubris, ii. 6.
• Troglodytes auricularis, i. 15.
• —— fasciolatus, ii. 226.
• —— furvus, i. 13, 16, 85.
• —— musculus, i. 13.
• —— platensis, i. 13.
• —— (Uropsila) auricularis, i. 15; ii. 223.
• Trogon, Azara’s, ii. 29.
• ——, Purple-breasted, ii. 29.
• —— surucura, ii. 29.
• —— variegatus, ii. 29.
• Trudeau’s Tern, ii. 195.
• Trupialis defilippii, i. 105.
• —— guianensis, i. 100.
• —— loyca, i. 104.
• —— militaris, i. 104, 105.
• Tryngites rufescens, ii. 190.
• Tucuman Woodpecker, ii. 21.
• Turdus crotopezus, i. 1.
• —— falklandicus, i. 3.
• —— fuscater, i. 4.
• —— leucomelas, i. 1.
• —— magellanicus, i. 3.
• —— nigriceps, i. 4.
• —— rufiventer, i. 3.
• —— rufiventris, i. 2, 3, 4.
• Turkey-Vulture, ii. 89.
• Turtle-Dove, Little, ii. 143.
• Tyrannus aurantio-atrocristatus, i. 157.
• —— melancholicus, i. 111, 158.
• —— verticalis, ii. 60.
• —— violentus, i. 160.
• Tyrant, Ashy, i. 121.
• ——, Ashy-black, i. 126.
• ——, Bienteveo, i. 147.
• ——, Black-and-yellow-crested, i. 157.
• ——, Black-crowned, i. 115.
• ——, Black-headed, i. 157.
• ——, Blackish, i. 141.
• ——, Blue-billed, i. 127.
• ——, Broad-billed, i. 136.
• ——, Cabanis’s, i. 128.
• ——, Chat-like, i. 120.
• ——, Chin-spotted, i. 133.
• ——, Chocolate, i. 112.
• ——, Cinereous, i. 128.
• ——, Cock-tailed, i. 122.
• ——, Dominican, i. 117.
• ——, Fierce, i. 156.
• ——, Greenish, i. 146.
• ——, Grey-eyed, i. 147.
• ——, Hudson’s Black, i. 126.
• ——, Little Brown, i. 151.
• ——, Long-tailed, i. 139.
• ——, Many-coloured, i. 142.
• ——, Melancholy, i. 158.
• ——, Mouse-brown, i. 119.
• ——, Narrow-tailed, i. 139.
• ——, Noisy, i. 145.
• ——, Pearly-bellied, i. 136.
• ——, Pepoaza, i. 114.
• ——, Red-backed, i. 134.
• ——, Red-throated, i. 136.
• ——, Red-topped, i. 134.
• ——, Reed, i. 137.
• ——, Rusty-tailed, i. 156.
• ——, Scarlet, i. 152.
• ——, Scissor-tail, i. 160.
• ——, Short-billed, i. 155.
• ——, Short-footed, i. 156.
• ——, Short-winged, i. 131.
• ——, Silver-bill, i. 129.
• ——, Small-crested, i. 140.
• ——, Solitary, i. 150.
• ——, Sorry, i. 144.
• ——, Spot-billed, i. 134.
• ——, Strange-tailed, i. 123.
• ——, Striped, i. 111.
• ——, Suiriri, i. 146.
• ——, Sulphury, i. 147.
• ——, Thin-tailed, i. 138.
• ——, Tit-like, i. 141.
• ——, Wagtail, i. 139.
• ——, Warlike, i. 151.
• ——, White-bellied, i. 121.
• ——, White-browed, i. 121.
• ——, White-crested, i. 145.
• ——, White-headed, i. 122.
• ——, White-tailed, i. 112.
• ——, Widow, i. 118.
• ——, Wing-banded, i. 155.
• ——, Yellow-bellied, i. 137.
• ——, Yellow-billed Tit-, i. 142.
• ——, Yellow-browed, i. 125.
• ——, Yetapa, i. 124.

• Upland Goose, Barred, ii. 123.
• Upucerthia dumetoria, i. 170.
• —— luscinia, i. 171.
• —— ruficauda, i. 171.
• Urraca, ii. 32.
• —— Jay, i. 110.
• Urubitinga meridionalis, ii. 63.
• —— unicincta, ii. 63.

• Vanduria aplomado, ii. 112.
• —— barroso, ii. 112.
• —— de Invierno, ii. 111.
• —— de las lagunas, ii. 112.
• Vanellus cayennensis, ii. 165, 195, 200.
• —— modestus, ii. 171.
• Varied Woodpecker, ii. 19.
• Variegated Heron, ii. 101.
• Veiled Wood-singer, i. 20.
• Viguá, ii. 92.
• Vinaceous Amazon, ii. 46.
• Violet-eared Humming-bird, ii. 3.
• Vireo chivi, i. 22.
• —— olivaceus, i. 22, 204.
• Vireosylvia chivi, i. 22.
• Virginian Owl, ii. 50.
• Viudita, i. 118.
• Vulture, Black, ii. 89.
• —— Turkey, ii. 89.

• Wagtail Tyrant, i. 139.
• Warbling Earth-Creeper, i. 171.
• Warbling Finch, Black-and-Chestnut, i. 49.
• ——, Pretty, i. 51.
• ——, Red-browed, i. 50.
• ——, Red-flanked, i. 51.
• ——, Ringed, i. 51.
• ——, White-and-Grey, i. 52.
• ——, White’s, i. 50.
• Warlike Tyrant, i. 151.
• Waterhen, American, ii. 156.
• ——, Little, ii. 156.
• Wedge-billed Wood-hewer, i. 199.
• Wedge-tailed Ground Finch, i. 63.
• Whimbrel, Esquimo, ii. 192.
• Whip-poor-Will, ii. 13.
• Whispering Ibis, ii. 113.
• Whistling Duck, ii. 127.
• —— Heron, ii. 100.
• —— Thorn-bird, i. 192.
• White Egret, ii. 98.
• White-and-Grey Warbling Finch, i. 52.
• White-banded Goatsucker, ii. 14.
• —— Mocking-bird, i. 8.
• White-bellied Tyrant, i. 121.
• —— Woodpecker, ii. 23.
• White-breasted Humming-bird, ii. 7.
• White-browed Tyrant, i. 121.
• White-capped Tanager, i. 38.
• White-crested Tyrant, i. 145.
• White-eyebrowed Scytalopus, i. 205.
• White-faced Ibis, ii. 109.
• —— Tree-Duck, ii. 128.
• White-headed Guan, ii. 146.
• —— Tyrant, i. 122.
• White-necked Tapacola, i. 207.
• White-rumped Swallow, i. 30.
• White-sided Humming-bird, ii. 1.
• White-tailed Buzzard, ii. 61.
• —— Kite, ii. 71.
• —— Tyrant, i. 112.
• White-throated Cachalote, i. 197.
• —— Humming-bird, ii. 7.
• —— Spine-tail, i. 179.
• —— Wood-hewer, i. 200.
• White-winged Bécard, i. 162.
• —— Cinclodes, i. 173.
• —— Lake-Duck, ii. 138.
• White’s Ground-Finch, i. 64.
• —— Spine-tail, i. 181.
• —— Warbling Finch, i. 50.
• Widow Tyrant, i. 118.
• Wigeon, Chiloe, ii. 135.
• Wilson’s Phalarope, ii. 180, 181.
• Wing-banded Tyrant, i. 155.
• Winter Plover, ii. 171, 172.
• Wood-bird, Brown-headed, i. 23.
• Wood-hewer, Bridge’s, i. 199.
• ——, Chestnut, i. 201.
• ——, Flat-billed, i. 199.
• ——, Narrow-billed, i. 201.
• ——, Robin-like, i. 198.
• ——, Wedge-billed, i. 199.
• ——, White-throated, i. 200.
• Wood-Ibis, ii. 108.
• Woodpecker, Allied, ii. 20.
• ——, Boie’s, ii. 17.
• ——, Cactus, ii. 19.
• ——, Gold-backed, ii. 21.
• ——, Pampas, ii. 24.
• ——, Red-crested, ii. 21.
• ——, Red-faced, ii. 18.
• ——, Red-fronted, ii. 20.
• ——, Schulz’s, ii. 18.
• ——, Tucuman, ii. 21.
• ——, Varied, ii. 19.
• ——, White-bellied, ii. 23.
• Wood-singer, Brown-capped, i. 21.
• ——, Golden-crowned, i. 21.
• ——, Pitiayumi, i. 20.
• ——, Veiled, i. 20.
• Wren, Black-headed Reed-, i. 13.
• ——, Brown House-, i. 13.
• ——, Eared, i. 15.
• ——, Platan Marsh-, i. 15.
• Wren-like Spine-tail, i. 188.

• Xanthornus pyrrhopterus, i. 107.
• Xanthosomus flavus, i. 98.
• —— ruficapillus, i. 99.
• Xiphocolaptes albicollis, i. 200.
• —— major, i. 201.
• Xolmis variegata, i. 116.

• Yabirú, ii. 106.
• Yacú caraguata, ii. 147.
• Yacúhú, El, ii. 146.
• Yellow Cardinal, i. 55.
• —— House-Sparrow, i. 66.
• —— Seed-Finch, i. 69.
• Yellow-bellied Tyrant, i. 137.
• Yellow-billed Coot, ii. 158.
• —— Cuckoo, ii. 37.
• —— Saltator, i. 42.
• —— Teal, ii. 131.
• —— Tit-Tyrant, i. 142.
• Yellow-breasted Marsh-bird, i. 102.
• Yellow-browed Tyrant, i. 125.
• Yellow-headed Marsh-bird, i. 98.
• Yellow-marked Spine-tail, i. 185.
• Yellow-shouldered Marsh-bird, i. 97.
• —— Song-Sparrow, i. 60.
• Yellow-striped Tanager, i. 41.
• Yellowshank, Greater, ii. 106.
• ——, Lesser, ii. 187.
• Yetapa Tyrant, i. 124.
• Ynambū azulado, ii. 207.
• —— tatāupā, ii. 208.
• Ypecaha Rail, ii. 150.

• Zancudo, ii. 179.
• Zapornia notata, ii. 155.
• Zenaida maculata, ii. 141.
• Zonotrichia canicapilla, i. 55, 59.
• —— hypochondria, i. 60.
• —— matutina, i. 58.
• —— pileata, i. 58, 59.
• —— strigiceps, i. 60, 64.
• Zorsal, i. 4.