Carol Johnson: Continental USA Year List 2021 ABA, All records: Top Blockers Record(s) 1 to 176 of 176 total. Seq. Species Scientific Name Seen By Other Listers Other Listers (%) 1 Snow Goose Anser caerulescens 2 66.67 2 Ross's Goose Anser rossii 1 33.33 3 Greater White-fronted Goose Anser albifrons 2 66.67 4 Brant Branta bernicla 2 66.67 5 Canada Goose Branta canadensis 3 100.00 6 Trumpeter Swan Cygnus buccinator 2 66.67 7 Tundra Swan Cygnus columbianus 2 66.67 8 Wood Duck Aix sponsa 2 66.67 9 Cinnamon Teal Spatula cyanoptera 2 66.67 10 Northern Shoveler Spatula clypeata 2 66.67 11 Gadwall Mareca strepera 3 100.00 12 American Wigeon Mareca americana 3 100.00 13 Mallard Anas platyrhynchos 3 100.00 14 Northern Pintail Anas acuta 3 100.00 15 Green-winged Teal Anas crecca 3 100.00 16 Canvasback Aythya valisineria 2 66.67 17 Redhead Aythya americana 2 66.67 18 Ring-necked Duck Aythya collaris 3 100.00 19 Greater Scaup Aythya marila 3 100.00 20 Lesser Scaup Aythya affinis 2 66.67 21 Surf Scoter Melanitta perspicillata 1 33.33 22 Bufflehead Bucephala albeola 3 100.00 23 Common Goldeneye Bucephala clangula 2 66.67 24 Red-breasted Merganser Mergus serrator 3 100.00 25 Ruddy Duck Oxyura jamaicensis 2 66.67 26 Mountain Quail Oreortyx pictus 1 33.33 27 California Quail Callipepla californica 1 33.33 28 Wild Turkey Meleagris gallopavo 3 100.00 29 Ring-necked Pheasant Phasianus colchicus 2 66.67 30 Pied-billed Grebe Podilymbus podiceps 3 100.00 31 Horned Grebe Podiceps auritus 3 100.00 32 Eared Grebe Podiceps nigricollis 2 66.67 33 Western Grebe Aechmophorus occidentalis 1 33.33 34 Clark's Grebe Aechmophorus clarkii 1 33.33 35 Rock Pigeon Columba livia 3 100.00 36 Eurasian Collared-Dove Streptopelia decaocto 2 66.67 37 Mourning Dove Zenaida macroura 3 100.00 38 Common Nighthawk Chordeiles minor 2 66.67 39 Chimney Swift Chaetura pelagica 3 100.00 40 White-throated Swift Aeronautes saxatalis 2 66.67 41 Black-chinned Hummingbird Archilochus alexandri 2 66.67 42 Anna's Hummingbird Calypte anna 2 66.67 43 Common Gallinule Gallinula galeata 2 66.67 44 American Coot Fulica americana 2 66.67 45 Sandhill Crane Antigone canadensis 2 66.67 46 Black-necked Stilt Himantopus mexicanus 2 66.67 47 American Avocet Recurvirostra americana 2 66.67 48 Black Oystercatcher Haematopus bachmani 1 33.33 49 Black-bellied Plover Pluvialis squatarola 3 100.00 50 Killdeer Charadrius vociferus 3 100.00 51 Snowy Plover Charadrius nivosus 2 66.67 52 Whimbrel Numenius phaeopus 1 33.33 53 Long-billed Curlew Numenius americanus 2 66.67 54 Marbled Godwit Limosa fedoa 3 100.00 55 Black Turnstone Arenaria melanocephala 1 33.33 56 Dunlin Calidris alpina 2 66.67 57 Least Sandpiper Calidris minutilla 2 66.67 58 Western Sandpiper Calidris mauri 2 66.67 59 Long-billed Dowitcher Limnodromus scolopaceus 2 66.67 60 Wilson's Snipe Gallinago delicata 2 66.67 61 Willet Tringa semipalmata 3 100.00 62 Greater Yellowlegs Tringa melanoleuca 3 100.00 63 Wilson's Phalarope Phalaropus tricolor 2 66.67 64 Bonaparte's Gull Chroicocephalus philadelphia 2 66.67 65 Heermann's Gull Larus heermanni 1 33.33 66 Short-billed Gull Larus brachyrhynchus 1 33.33 67 Ring-billed Gull Larus delawarensis 3 100.00 68 California Gull Larus californicus 1 33.33 69 Forster's Tern Sterna forsteri 2 66.67 70 Pacific Loon Gavia pacifica 1 33.33 71 Common Loon Gavia immer 2 66.67 72 Brandt's Cormorant Urile penicillatus 1 33.33 73 Pelagic Cormorant Urile pelagicus 1 33.33 74 Double-crested Cormorant Nannopterum auritum 3 100.00 75 American White Pelican Pelecanus erythrorhynchos 2 66.67 76 Brown Pelican Pelecanus occidentalis 2 66.67 77 American Bittern Botaurus lentiginosus 2 66.67 78 Great Blue Heron Ardea herodias 3 100.00 79 Great Egret Ardea alba 3 100.00 80 Snowy Egret Egretta thula 3 100.00 81 Black-crowned Night-Heron Nycticorax nycticorax 2 66.67 82 White-faced Ibis Plegadis chihi 2 66.67 83 Turkey Vulture Cathartes aura 3 100.00 84 Osprey Pandion haliaetus 3 100.00 85 White-tailed Kite Elanus leucurus 2 66.67 86 Northern Harrier Circus hudsonius 3 100.00 87 Cooper's Hawk Accipiter cooperii 3 100.00 88 Bald Eagle Haliaeetus leucocephalus 3 100.00 89 Red-shouldered Hawk Buteo lineatus 3 100.00 90 Swainson's Hawk Buteo swainsoni 2 66.67 91 Red-tailed Hawk Buteo jamaicensis 3 100.00 92 Burrowing Owl Athene cunicularia 2 66.67 93 Belted Kingfisher Megaceryle alcyon 3 100.00 94 Acorn Woodpecker Melanerpes formicivorus 2 66.67 95 Red-naped Sapsucker Sphyrapicus nuchalis 1 33.33 96 Red-breasted Sapsucker Sphyrapicus ruber 1 33.33 97 Nuttall's Woodpecker Dryobates nuttallii 1 33.33 98 White-headed Woodpecker Dryobates albolarvatus 1 33.33 99 Northern Flicker Colaptes auratus 3 100.00 100 American Kestrel Falco sparverius 3 100.00 101 Western Kingbird Tyrannus verticalis 2 66.67 102 Western Wood-Pewee Contopus sordidulus 2 66.67 103 Black Phoebe Sayornis nigricans 2 66.67 104 Say's Phoebe Sayornis saya 2 66.67 105 Warbling Vireo Vireo gilvus 2 66.67 106 Red-eyed Vireo Vireo olivaceus 2 66.67 107 Steller's Jay Cyanocitta stelleri 2 66.67 108 California Scrub-Jay Aphelocoma californica 1 33.33 109 Clark's Nutcracker Nucifraga columbiana 1 33.33 110 Black-billed Magpie Pica hudsonia 1 33.33 111 Yellow-billed Magpie Pica nuttalli 1 33.33 112 American Crow Corvus brachyrhynchos 3 100.00 113 Common Raven Corvus corax 2 66.67 114 Black-capped Chickadee Poecile atricapillus 3 100.00 115 Mountain Chickadee Poecile gambeli 1 33.33 116 Chestnut-backed Chickadee Poecile rufescens 1 33.33 117 Oak Titmouse Baeolophus inornatus 1 33.33 118 Horned Lark Eremophila alpestris 2 66.67 119 Tree Swallow Tachycineta bicolor 3 100.00 120 Barn Swallow Hirundo rustica 3 100.00 121 Cliff Swallow Petrochelidon pyrrhonota 2 66.67 122 Bushtit Psaltriparus minimus 2 66.67 123 Ruby-crowned Kinglet Corthylio calendula 3 100.00 124 Cedar Waxwing Bombycilla cedrorum 3 100.00 125 Red-breasted Nuthatch Sitta canadensis 3 100.00 126 White-breasted Nuthatch Sitta carolinensis 3 100.00 127 Pygmy Nuthatch Sitta pygmaea 2 66.67 128 Bewick's Wren Thryomanes bewickii 2 66.67 129 House Wren Troglodytes aedon 3 100.00 130 Marsh Wren Cistothorus palustris 3 100.00 131 Sage Thrasher Oreoscoptes montanus 1 33.33 132 Northern Mockingbird Mimus polyglottos 3 100.00 133 European Starling Sturnus vulgaris 3 100.00 134 Western Bluebird Sialia mexicana 1 33.33 135 Mountain Bluebird Sialia currucoides 2 66.67 136 Veery Catharus fuscescens 2 66.67 137 American Robin Turdus migratorius 3 100.00 138 House Sparrow Passer domesticus 3 100.00 139 American Pipit Anthus rubescens 2 66.67 140 Evening Grosbeak Coccothraustes vespertinus 1 33.33 141 House Finch Haemorhous mexicanus 3 100.00 142 Cassin's Finch Haemorhous cassinii 1 33.33 143 Pine Siskin Spinus pinus 2 66.67 144 Lesser Goldfinch Spinus psaltria 2 66.67 145 American Goldfinch Spinus tristis 3 100.00 146 Chipping Sparrow Spizella passerina 3 100.00 147 Field Sparrow Spizella pusilla 3 100.00 148 Brewer's Sparrow Spizella breweri 1 33.33 149 Dark-eyed Junco Junco hyemalis 3 100.00 150 White-crowned Sparrow Zonotrichia leucophrys 2 66.67 151 Golden-crowned Sparrow Zonotrichia atricapilla 1 33.33 152 Vesper Sparrow Pooecetes gramineus 1 33.33 153 Savannah Sparrow Passerculus sandwichensis 2 66.67 154 Song Sparrow Melospiza melodia 3 100.00 155 California Towhee Melozone crissalis 1 33.33 156 Spotted Towhee Pipilo maculatus 2 66.67 157 Yellow-headed Blackbird Xanthocephalus xanthocephalus 2 66.67 158 Western Meadowlark Sturnella neglecta 2 66.67 159 Bullock's Oriole Icterus bullockii 1 33.33 160 Baltimore Oriole Icterus galbula 3 100.00 161 Red-winged Blackbird Agelaius phoeniceus 3 100.00 162 Brown-headed Cowbird Molothrus ater 3 100.00 163 Brewer's Blackbird Euphagus cyanocephalus 2 66.67 164 Common Grackle Quiscalus quiscula 3 100.00 165 Great-tailed Grackle Quiscalus mexicanus 2 66.67 166 Common Yellowthroat Geothlypis trichas 3 100.00 167 American Redstart Setophaga ruticilla 2 66.67 168 Chestnut-sided Warbler Setophaga pensylvanica 3 100.00 169 Yellow-rumped Warbler Setophaga coronata 3 100.00 170 Townsend's Warbler Setophaga townsendi 3 100.00 171 Hermit Warbler Setophaga occidentalis 2 66.67 172 Western Tanager Piranga ludoviciana 1 33.33 173 Northern Cardinal Cardinalis cardinalis 3 100.00 174 Rose-breasted Grosbeak Pheucticus ludovicianus 2 66.67 175 Indigo Bunting Passerina cyanea 2 66.67 176 Dickcissel Spiza americana 2 66.67