Below is a list with the 125 least 'ticked' species by members of the WP rankings. The so-called 'Blockers'! Species seen by Seppo Järvinen are marked with an 'X' in the left side of the list.
1 Shy Albatross 1 2 Soft-plumaged Petrel 1 3 Black-capped Petrel 1 4 Jouanin's Petrel 1 5 Cape Gannet 1 6 Least Bittern 1 7 Spur-winged Goose 1 8 Nubian Bustard 1 9 Arabian Bustard 1 10 Egyptian Plover 1 11 American Woodcock 1 12 Brown Noddy 1 13 Tufted Puffin 1 14 Eastern Phoebe 1 15 Chestnut-headed Sparrow-lark 1 16 Daurian Redstart 1 17 Orange-cheeked Waxbill 1 18 Cerulean Warbler 1 19 Palm Warbler 1 20 Yellow-headed Blackbird 1 21 Southern Giant Petrel 2 22 Atlantic Petrel 2 23 Marabou Stork 2 24 Cinnamon Teal 2 25 African Fish Eagle 2 26 White-breasted Waterhen 2 27 Vega Gull 2 28 Asian Koel 2 29 Least Flycatcher 2 30 Western Kingbird 2 31 Connecticut Warbler 2 32 African Darter 3 33 Indian Pond Heron 3 34 Cape Teal 3 35 Bald Eagle 3 36 Ethiopian Swallow 3 37 Ruby-crowned Kinglet 3 38 Mugimaki Flycatcher 3 39 Daurian Starling 3 40 Prothonotary Warbler 3 41 Brown-headed Cowbird 3 42 Common Ostrich 4 43 Atlantic Yellow-nosed Albatross 4 44 Persian Shearwater 4 45 Masked Booby 4 46 Lesser Frigatebird 4 47 Eastern Cattle Egret 4 48 Spectacled Eider 4 49 Swallow-tailed Kite 4 50 Siberian Blue Robin 4 51 Variable Wheatear 4 52 Asian House Martin 5 53 Village Weaver 5 54 Hooded Vulture 6 55 Siberian Crane 6 56 Black Drongo 6 57 Eastern Kingbird 7 58 Hume's Wheatear 7 59 Varied Thrush 7 60 White-backed Vulture 8 61 Lesser Moorhen 8 62 Chestnut-sided Warbler 8 63 Prairie Warbler 8 64 Streaked Shearwater 9 65 Fulvous Whistling Duck 9 66 American Kestrel 9 67 Yellow-bellied Flycatcher 9 68 Broad-billed Roller 10 69 Plain Leaf Warbler 10 70 Trindade Petrel 11 71 Streak-throated Swallow 13 72 Grey-throated Martin 14 73 African Silverbill 14 74 Black-bellied Storm Petrel 15 75 Diederik Cuckoo 15 76 Rufous-tailed Robin 15 77 Chestnut-eared Bunting 15 78 Pallas's Reed Bunting 15 79 Red-winged Blackbird 15 80 Cabot's Tern 16 81 Black-rumped Waxbill 16 82 Red-billed Firefinch 17 83 Summer Tanager 17 84 X Red-billed Teal 19 Israel Idan sewage pools 20-03-2016 85 X Red-masked Parakeet 19 Spain Valencia, Turia Parc 06-07-2019 86 Cape May Warbler 19 87 Dark Chanting Goshawk 21 88 Acadian Flycatcher 21 89 Basalt Wheatear 21 90 Thick-billed Warbler 21 91 White-throated Needletail 22 92 Pale Martin 22 93 X Red-whiskered Bulbul 22 Spain Valencia, Parc de Capcalera 07-07-2019 94 Ashy Drongo 22 95 Daurian Jackdaw 22 96 Lark Sparrow 22 97 Chinese Pond Heron 23 98 Black-headed Heron 23 99 Least Tern 23 100 Pin-tailed Snipe 25 101 South Polar Skua 25 102 African Crake 26 103 Oriental Plover 26 104 Purple Gallinule 28 105 Yellow-bellied Sapsucker 29 106 Algerian Nuthatch 30 107 X Northern Shrike 30 Portugal Corvo, Azores 18-10-2016 108 X Red Fox Sparrow 30 Estonia Haapsalu 04-12-2012 109 X White-throated Bee-eater 33 Morocco Dakhla Attitude, Western Sahara 18-03-2017 110 Yellow-throated Warbler 33 111 Northern Mockingbird 34 112 Ashy-throated Parrotbill 34 113 X Yellow Bittern 35 Egypt Wadi Lahami 22-05-2018 114 White-tailed Tropicbird 36 115 Ancient Murrelet 36 116 X Pin-tailed Whydah 38 Portugal Escusa 06-05-2019 117 Savannah Sparrow 38 118 Red-throated Thrush 39 119 X Tricolored Heron 40 Portugal Ribeira Quente, Sao Miguel, Azores 29-10-2018 120 X Pallas's Sandgrouse 40 Finland Lappeenranta 30-07-2010 121 Purple Martin 40
Seppo Järvinen have ticked 819 species at his WP list! 10 of these are between the 125 least 'ticked' species, the so-called 'Blockers'!