| Region | Species | Observers | Sites | Lists | Observations |
| World | 6339 | 522 | 24004 | 112983 | 2021012 |
| Albania | 34 | 1 | 3 | 3 | 45 |
| Algeria | 11 | 1 | 1 | 1 | 11 |
| Andorra | 11 | 2 | 3 | 3 | 11 |
| Antarctica and Southern Ocean | 32 | 2 | 13 | 13 | 108 |
| Argentina: Buenos Aires | 137 | 9 | 11 | 20 | 458 |
| Argentina: Chubut | 13 | 2 | 2 | 2 | 13 |
| Argentina: Entre Rios | 136 | 1 | 5 | 6 | 284 |
| Argentina: Misiones | 67 | 3 | 2 | 5 | 109 |
| Argentina: Rio Negro | 23 | 1 | 1 | 1 | 23 |
| Argentina: Salta | 1 | 1 | 1 | 1 | 1 |
| Argentina: Santa Cruz | 72 | 4 | 5 | 6 | 121 |
| Argentina: Tierra del Fuego | 73 | 5 | 6 | 14 | 209 |
| Australia: Ashmore and Cartier Islands | 86 | 2 | 2 | 15 | 218 |
| Australia: Australian Capital Territory | 263 | 63 | 265 | 2876 | 57990 |
| Australia: Christmas Island | 97 | 8 | 15 | 79 | 785 |
| Australia: Cocos-Keeling Islands | 83 | 6 | 7 | 51 | 375 |
| Australia: Coral Sea Territory | 26 | 3 | 7 | 8 | 59 |
| Australia: Macquarie Island | 24 | 2 | 4 | 6 | 53 |
| Australia: New South Wales | 550 | 228 | 3890 | 18782 | 262746 |
| Australia: Norfolk Island | 70 | 14 | 21 | 63 | 962 |
| Australia: Northern Territory | 392 | 93 | 1373 | 5419 | 117669 |
| Australia: Queensland | 636 | 230 | 4266 | 20862 | 492079 |
| Australia: South Australia | 409 | 102 | 1648 | 3990 | 63791 |
| Australia: Tasmania | 250 | 84 | 655 | 2206 | 32263 |
| Australia: Victoria | 490 | 260 | 4306 | 38752 | 751480 |
| Australia: Western Australia | 492 | 86 | 2257 | 3948 | 59025 |
| Austria | 77 | 6 | 8 | 11 | 183 |
| Bahamas | 1 | 1 | 1 | 1 | 1 |
| Belgium | 65 | 3 | 9 | 10 | 186 |
| Belize | 5 | 1 | 1 | 1 | 5 |
| Bermuda | 57 | 1 | 1 | 4 | 119 |
| Bhutan | 310 | 1 | 1 | 1 | 325 |
| Bolivia | 268 | 5 | 27 | 40 | 516 |
| Botswana | 408 | 8 | 29 | 43 | 1843 |
| Brazil: Acre | 36 | 1 | 1 | 3 | 38 |
| Brazil: Amazonas | 25 | 1 | 3 | 5 | 25 |
| Brazil: Mato Grosso | 164 | 3 | 11 | 16 | 421 |
| Brazil: Mato Grosso do Sul | 105 | 2 | 3 | 3 | 150 |
| Brazil: Minas Gerais | 93 | 1 | 3 | 3 | 116 |
| Brazil: Parana | 43 | 3 | 3 | 7 | 68 |
| Brazil: Rio de Janeiro | 33 | 1 | 1 | 4 | 42 |
| Brazil: São Paulo | 301 | 4 | 8 | 8 | 443 |
| Brunei | 43 | 3 | 2 | 3 | 57 |
| Cambodia | 237 | 6 | 9 | 23 | 480 |
| Canada: Alberta | 131 | 6 | 48 | 90 | 742 |
| Canada: British Columbia | 212 | 12 | 147 | 203 | 1766 |
| Canada: Manitoba | 4 | 1 | 3 | 3 | 5 |
| Canada: Newfoundland and Labrador | 50 | 2 | 2 | 3 | 71 |
| Canada: Nova Scotia | 66 | 1 | 1 | 1 | 66 |
| Canada: Ontario | 249 | 7 | 24 | 54 | 1874 |
| Canada: Quebec | 271 | 3 | 247 | 1281 | 16230 |
| Canada: Saskatchewan | 6 | 1 | 3 | 3 | 6 |
| Canada: Yukon | 32 | 1 | 7 | 7 | 47 |
| Chile: Antofagasta | 24 | 2 | 3 | 4 | 31 |
| Chile: Araucanía | 19 | 1 | 1 | 1 | 19 |
| Chile: Arica and Parinacota | 9 | 1 | 1 | 1 | 9 |
| Chile: Atacama | 4 | 1 | 1 | 1 | 4 |
| Chile: Coquimbo | 5 | 1 | 1 | 1 | 5 |
| Chile: Los Lagos | 81 | 2 | 11 | 19 | 264 |
| Chile: Magallanes | 53 | 2 | 9 | 14 | 84 |
| Chile: O'Higgins | 35 | 1 | 1 | 1 | 36 |
| Chile: Santiago | 60 | 3 | 8 | 13 | 135 |
| Chile: Valparaíso | 81 | 4 | 10 | 13 | 123 |
| China: Beijing | 9 | 2 | 2 | 2 | 10 |
| China: Guangdong | 11 | 1 | 1 | 1 | 11 |
| China: Guangxi | 25 | 1 | 8 | 8 | 63 |
| China: Hebei | 18 | 3 | 3 | 4 | 27 |
| China: Hong Kong | 271 | 13 | 29 | 79 | 2399 |
| China: Shanghai | 10 | 3 | 3 | 3 | 12 |
| China: Taiwan | 69 | 3 | 7 | 10 | 110 |
| Colombia | 187 | 4 | 13 | 16 | 314 |
| Congo DR (Zaire) | 380 | 1 | 49 | 148 | 1085 |
| Cook Islands | 35 | 3 | 11 | 19 | 219 |
| Costa Rica | 486 | 4 | 33 | 70 | 1729 |
| Côte d'Ivoire | 29 | 1 | 2 | 2 | 30 |
| Croatia | 37 | 1 | 1 | 1 | 37 |
| Cuba | 57 | 2 | 3 | 6 | 77 |
| Czech Republic | 101 | 3 | 20 | 22 | 151 |
| Denmark | 81 | 6 | 23 | 25 | 300 |
| Djibouti | 67 | 1 | 6 | 9 | 89 |
| East Timor | 76 | 3 | 7 | 12 | 121 |
| Ecuador | 655 | 6 | 34 | 64 | 1558 |
| Ecuador: Galapagos | 48 | 2 | 1 | 5 | 93 |
| Egypt | 35 | 4 | 9 | 9 | 49 |
| Eritrea | 18 | 1 | 2 | 3 | 22 |
| Estonia | 51 | 2 | 4 | 6 | 79 |
| Ethiopia | 404 | 2 | 70 | 157 | 1972 |
| Falkland Islands | 18 | 1 | 2 | 2 | 21 |
| Fiji | 75 | 15 | 43 | 91 | 973 |
| Finland | 32 | 4 | 6 | 7 | 55 |
| France | 211 | 21 | 100 | 217 | 2278 |
| France: Réunion | 13 | 1 | 2 | 2 | 13 |
| French Polynesia | 10 | 1 | 1 | 1 | 10 |
| Gambia | 186 | 1 | 1 | 1 | 186 |
| Georgia | 4 | 1 | 2 | 2 | 4 |
| Germany | 96 | 9 | 30 | 50 | 519 |
| Greece | 52 | 3 | 4 | 6 | 92 |
| Guinea | 23 | 1 | 3 | 7 | 23 |
| Guyana | 2 | 1 | 1 | 1 | 2 |
| Hungary | 10 | 1 | 1 | 1 | 10 |
| Iceland | 71 | 6 | 29 | 47 | 588 |
| India: Delhi | 22 | 3 | 1 | 3 | 25 |
| India: Haryana | 9 | 1 | 1 | 1 | 9 |
| India: Himachal Pradesh | 61 | 2 | 4 | 4 | 82 |
| India: Jammu & Kashmir | 38 | 2 | 4 | 4 | 40 |
| India: Karnataka | 104 | 3 | 9 | 9 | 173 |
| India: Madhya Pradesh | 140 | 2 | 2 | 2 | 156 |
| India: Maharashtra | 6 | 2 | 2 | 3 | 11 |
| India: Rajasthan | 166 | 4 | 10 | 14 | 262 |
| India: Tamil Nadu | 2 | 1 | 1 | 1 | 2 |
| India: Uttar Pradesh | 39 | 3 | 4 | 5 | 54 |
| India: Uttaranchal | 90 | 1 | 3 | 3 | 90 |
| India: West Bengal | 71 | 2 | 2 | 9 | 184 |
| Indian Ocean | 48 | 1 | 5 | 5 | 59 |
| Indonesia: Java | 325 | 11 | 43 | 91 | 1998 |
| Indonesia: Kalimantan | 100 | 3 | 6 | 11 | 139 |
| Indonesia: Lesser Sundas | 84 | 2 | 4 | 4 | 93 |
| Indonesia: Maluku Islands | 77 | 4 | 10 | 13 | 114 |
| Indonesia: Sulawesi | 153 | 3 | 16 | 33 | 550 |
| Indonesia: Sumatra | 218 | 2 | 3 | 3 | 251 |
| Iraq | 3 | 1 | 1 | 1 | 3 |
| Ireland | 112 | 5 | 15 | 15 | 195 |
| Israel | 189 | 4 | 37 | 46 | 621 |
| Italy | 153 | 10 | 32 | 41 | 696 |
| Japan | 238 | 8 | 41 | 59 | 1009 |
| Japan: Nansei Shoto | 54 | 2 | 3 | 5 | 113 |
| Jordan | 14 | 1 | 1 | 1 | 14 |
| Kenya | 664 | 11 | 76 | 191 | 3990 |
| Kosovo | 16 | 1 | 1 | 1 | 16 |
| Kyrgyzstan | 97 | 1 | 5 | 5 | 149 |
| Latvia | 29 | 1 | 1 | 1 | 29 |
| Lebanon | 8 | 1 | 3 | 3 | 9 |
| Lesotho | 53 | 2 | 12 | 13 | 102 |
| Luxembourg | 17 | 3 | 4 | 5 | 34 |
| Madagascar | 62 | 1 | 9 | 9 | 69 |
| Malawi | 236 | 3 | 8 | 13 | 416 |
| Malaysia: Malaya | 422 | 16 | 68 | 173 | 3320 |
| Malaysia: Sabah | 357 | 9 | 41 | 88 | 2377 |
| Malaysia: Sarawak | 237 | 5 | 11 | 16 | 470 |
| Mauritius | 33 | 3 | 5 | 8 | 68 |
| Mexico: Baja California | 3 | 1 | 1 | 1 | 3 |
| Mexico: Baja California Sur | 20 | 1 | 1 | 1 | 20 |
| Mexico: Chiapas | 18 | 1 | 1 | 1 | 18 |
| Mexico: Coahuila | 58 | 1 | 2 | 3 | 87 |
| Mexico: Guerrero | 36 | 1 | 1 | 1 | 36 |
| Mexico: Mexico City & Distrito Federal | 54 | 1 | 1 | 1 | 54 |
| Mexico: Morelos | 13 | 1 | 1 | 1 | 13 |
| Mexico: Puebla | 6 | 1 | 1 | 1 | 6 |
| Mexico: Quintana Roo | 1 | 1 | 1 | 1 | 1 |
| Mexico: Veracruz | 6 | 1 | 1 | 1 | 6 |
| Mongolia | 22 | 2 | 3 | 9 | 38 |
| Mozambique | 37 | 1 | 2 | 2 | 37 |
| Namibia | 396 | 5 | 18 | 29 | 1349 |
| Nepal | 398 | 5 | 19 | 31 | 1158 |
| Netherlands | 145 | 8 | 34 | 48 | 674 |
| New Caledonia | 100 | 6 | 40 | 50 | 526 |
| New Zealand | 194 | 42 | 287 | 547 | 6949 |
| New Zealand: Auckland and Campbell Is. | 32 | 2 | 3 | 5 | 55 |
| New Zealand: Chatham Islands | 26 | 1 | 1 | 1 | 26 |
| Norway | 129 | 5 | 33 | 57 | 629 |
| Oman | 118 | 1 | 14 | 24 | 470 |
| Pacific Ocean | 2 | 1 | 1 | 1 | 2 |
| Pakistan | 25 | 2 | 3 | 3 | 25 |
| Palestine | 6 | 1 | 3 | 3 | 6 |
| Panama | 322 | 3 | 15 | 45 | 1019 |
| Papua New Guinea | 496 | 8 | 106 | 234 | 2604 |
| Paraguay | 8 | 1 | 1 | 2 | 8 |
| Peru | 646 | 8 | 38 | 67 | 1663 |
| Philippines | 299 | 4 | 13 | 16 | 435 |
| Poland | 21 | 1 | 3 | 3 | 37 |
| Portugal | 196 | 5 | 31 | 46 | 1482 |
| Qatar | 84 | 1 | 4 | 4 | 143 |
| Russia: Ivanovo | 5 | 1 | 1 | 1 | 5 |
| Russia: Krasnodar | 12 | 1 | 1 | 1 | 12 |
| Russia: Leningrad | 24 | 2 | 3 | 4 | 41 |
| Russia: Moscow | 27 | 2 | 4 | 10 | 67 |
| Russia: Rostov | 26 | 1 | 1 | 1 | 26 |
| Russia: Vladimir | 8 | 1 | 1 | 1 | 8 |
| Russia: Yaroslavl | 3 | 1 | 1 | 1 | 3 |
| Rwanda | 300 | 3 | 23 | 83 | 861 |
| Samoa | 14 | 1 | 1 | 1 | 14 |
| Seychelles | 49 | 3 | 8 | 14 | 128 |
| Singapore | 202 | 23 | 32 | 104 | 1714 |
| Slovenia | 34 | 2 | 5 | 6 | 58 |
| Solomon Islands | 40 | 2 | 4 | 5 | 71 |
| Somalia | 119 | 1 | 13 | 28 | 186 |
| South Africa | 692 | 18 | 617 | 814 | 20256 |
| South Georgia and the South Sandwich Islands | 22 | 1 | 2 | 3 | 27 |
| South Korea | 92 | 2 | 3 | 4 | 111 |
| South Orkneys | 5 | 1 | 1 | 1 | 5 |
| Spain | 254 | 13 | 98 | 163 | 2882 |
| Sri Lanka | 58 | 1 | 8 | 8 | 59 |
| Swaziland | 69 | 3 | 9 | 9 | 108 |
| Sweden | 167 | 7 | 64 | 95 | 1079 |
| Switzerland | 167 | 14 | 51 | 79 | 1296 |
| Syria | 10 | 1 | 1 | 1 | 10 |
| Tanzania | 392 | 9 | 22 | 65 | 1515 |
| Tasman Sea | 25 | 3 | 10 | 10 | 41 |
| Thailand | 520 | 15 | 88 | 138 | 2691 |
| Tonga | 31 | 2 | 1 | 2 | 42 |
| Turkey | 149 | 4 | 21 | 27 | 359 |
| Uganda | 63 | 2 | 11 | 13 | 73 |
| Ukraine | 6 | 1 | 3 | 3 | 6 |
| United Arab Emirates | 104 | 2 | 10 | 11 | 227 |
| United Kingdom | 359 | 42 | 1192 | 7972 | 50162 |
| United States of America: Alabama | 1 | 1 | 1 | 1 | 1 |
| United States of America: Alaska | 126 | 4 | 61 | 72 | 681 |
| United States of America: Arizona | 212 | 7 | 18 | 31 | 490 |
| United States of America: Arkansas | 74 | 1 | 6 | 42 | 82 |
| United States of America: California | 325 | 17 | 114 | 339 | 4085 |
| United States of America: Colorado | 115 | 5 | 21 | 28 | 269 |
| United States of America: Delaware | 46 | 1 | 1 | 1 | 46 |
| United States of America: Florida | 250 | 13 | 39 | 101 | 2749 |
| United States of America: Georgia | 42 | 2 | 2 | 3 | 46 |
| United States of America: Hawaii | 64 | 7 | 17 | 18 | 185 |
| United States of America: Idaho | 33 | 2 | 2 | 2 | 35 |
| United States of America: Indiana | 7 | 1 | 1 | 1 | 7 |
| United States of America: Kentucky | 32 | 2 | 2 | 2 | 36 |
| United States of America: Louisiana | 25 | 1 | 3 | 4 | 28 |
| United States of America: Maine | 87 | 2 | 2 | 3 | 109 |
| United States of America: Maryland | 109 | 2 | 13 | 18 | 238 |
| United States of America: Massachusetts | 101 | 6 | 8 | 10 | 177 |
| United States of America: Michigan | 64 | 1 | 5 | 8 | 90 |
| United States of America: Minnesota | 57 | 1 | 1 | 1 | 57 |
| United States of America: Mississippi | 76 | 2 | 4 | 4 | 104 |
| United States of America: Montana | 7 | 1 | 1 | 1 | 7 |
| United States of America: Nevada | 75 | 4 | 3 | 5 | 93 |
| United States of America: New Hampshire | 1 | 1 | 1 | 1 | 1 |
| United States of America: New Jersey | 248 | 6 | 7 | 11 | 485 |
| United States of America: New Mexico | 77 | 3 | 6 | 8 | 116 |
| United States of America: New York | 137 | 10 | 11 | 29 | 464 |
| United States of America: North Carolina | 68 | 2 | 4 | 5 | 87 |
| United States of America: Oregon | 142 | 3 | 14 | 18 | 279 |
| United States of America: Pennsylvania | 33 | 2 | 2 | 2 | 40 |
| United States of America: South Carolina | 127 | 4 | 7 | 9 | 251 |
| United States of America: Tennessee | 42 | 4 | 6 | 8 | 62 |
| United States of America: Texas | 162 | 4 | 20 | 23 | 410 |
| United States of America: Utah | 46 | 3 | 6 | 6 | 51 |
| United States of America: Virginia | 60 | 1 | 1 | 5 | 79 |
| United States of America: Washington | 122 | 3 | 14 | 17 | 235 |
| United States of America: West Virginia | 3 | 1 | 2 | 3 | 3 |
| United States of America: Wisconsin | 48 | 1 | 3 | 31 | 53 |
| United States of America: Wyoming | 29 | 2 | 2 | 4 | 34 |
| Uzbekistan | 77 | 2 | 4 | 4 | 110 |
| Vanuatu | 37 | 4 | 7 | 9 | 64 |
| Venezuela | 86 | 2 | 7 | 8 | 102 |
| Vietnam | 386 | 10 | 22 | 36 | 1042 |
| Virgin Islands (UK) | 13 | 1 | 4 | 4 | 14 |
| Virgin Islands (US) | 34 | 1 | 9 | 13 | 59 |
| Zambia | 518 | 6 | 12 | 16 | 950 |
| Zimbabwe | 446 | 7 | 27 | 42 | 1938 |