Goldenweek BigDay 2026 Results and Records
Overview#
Number of participating teams: 10
Prefectures with observations: 10
OSJ8
Number of orders recorded： 18
Number of families recorded： 50
Number of genera recorded： 109
Number of species recorded： 170
New species: 8
2026年4月29日～5月5日にかけて行われたGWビッグデイの結果です。
今回のGWビッグデイは、参加チームは10チーム、10都道府県、記録種数170種と、若干少なめでしたが、ヨタカ、キリアイ、サルハマシギ、チュウジシギ、セグロカッコウ、アカアシチョウゲンボウ、オウチュウ、メボソムシクイの8種が初登場種となりました！ アカアシチョウゲンボウは山口と秋田とぜんぜん違う場所なのが驚きです。セグロカッコウやオウチュウは今後の気候変動でレギュラー入りしていくのでしょうか。興味深いところです。
今回も多くの皆様にご参加いただきました。参加された皆様、お疲れさまでした。
Rules#
・観察場所：日本国内
・観察期間：開催期間内の任意の連続した24時間以内（※分割不可）
・種の確認：目視、または確実に種が同定できる形での音声確認
・対象種：日本鳥類目録第8版に準拠（外来種×、検討種・再移入種○）
・参加形態：個人またはチーム。チームの場合、行動を共にし全員が確認できた種のみカウント
・最多種数部門、オンリーワン部門に加え、アチーブメントとして BH, BS, EoD, WO, BtH, VL, LF の7つの制約付き部門を宣言して参加可能。
Number of species by prefecture#
都道府県別では、E.G.awakunさんの観察した新潟県が78種で1位でした！
2位は本気(マジ)ロクロハラアジサシさん、沢雅治さんらの岩手県の76種
3位は本気(マジ)ロクロハラアジサシさん、妖怪ファミリーさんらの74種の宮城県でした。
| Rank | Prefecture | Species | Contributed teams |
|---|---|---|---|
| 1🥇 | Niigata | 78 | E.G.awakun |
| 2🥈 | Iwate | 76 | 本気(マジ)ロクロハラアジサシ, 沢雅治 |
| 3🥉 | Miyagi | 74 | 妖怪ファミリー, 本気(マジ)ロクロハラアジサシ |
| 4 | Yamaguchi | 65 | ほおじろう |
| 5 | Osaka | 64 | natsume |
| 6 | Saga | 47 | Teal & 鳥利休 |
| 7 | Akita | 42 | 杉山 |
| 8 | Nagano | 38 | シメさんチーム |
| 9 | Nagasaki | 18 | Teal & 鳥利休 |
| 10 | Tokyo | 16 | ねり |
Participating teams and species counts#
最多種数部門の堂々の1位は、E.G.awakunさんで78種でした！山の鳥から海の鳥、冬鳥から夏鳥と満遍なく観察されています。
2位は沢雅治さんの76種、3位は本気(マジ)ロクロハラアジサシさんの73種でした。
他のチームの皆さんも、それぞれ素晴らしい観察リストを作成されています。
チーム詳細のページもぜひご覧ください。
| Rank | Team | Species | Prefecture |
|---|---|---|---|
| 1🥇 | E.G.awakun | 78 | Niigata |
| 2🥈 | 沢雅治 | 76 | Iwate |
| 3🥉 | 本気(マジ)ロクロハラアジサシ | 73 | Iwate, Miyagi |
| 4 | Teal & 鳥利休 | 65 | Saga, Nagasaki |
| 4 | ほおじろう | 65 | Yamaguchi |
| 6 | natsume | 64 | Osaka |
| 7 | 杉山 | 42 | Akita |
| 8 | シメさんチーム | 38 | Nagano |
| 9 | 妖怪ファミリー | 19 | Miyagi |
| 10 | ねり | 16 | Tokyo |
Species recorded by only one team#
他のチームが見つけられなかった種、あるいは観察難易度の高い種をどれだけ記録できたかを競う「オンリーワン」部門では、ほおじろうさんが17種で第1位となりました!
第2位は Teal & 鳥利休 さんの13種ででした。
第3位は 沢雅治 さんの10種です。
「オンリーワン」のリストには、他のチームからもそれぞれ興味深い種が記録されています。
| Rank | Team | Species | Species |
|---|---|---|---|
| 1🥇 | ほおじろう | 17 | Grey Nightjar, Indian Cuckoo, Japanese Wood Pigeon, Little Curlew, Oriental Pratincole, Chinese Pond Heron, Chinese Egret, Oriental Dollarbird, Black Drongo, Light-vented Bulbul, Sand Martin, Red-rumped Swallow, Dusky Warbler, Yellow-rumped Flycatcher, Eastern Yellow Wagtail, Tristram’s Bunting, Black-faced Bunting |
| 2🥈 | Teal & 鳥利休 | 13 | Common Shelduck, Far Eastern Curlew, Black-tailed Godwit, Sharp-tailed Sandpiper, Curlew Sandpiper, Common Greenshank, Saunders’s Gull, Oriental Stork, Eurasian Spoonbill, Black-faced Spoonbill, Eurasian Magpie, Eyebrowed Thrush, Ryukyu Flycatcher |
| 3🥉 | 沢雅治 | 10 | Brant Goose, Black Scoter, Common Goldeneye, Common Merganser, Red-breasted Merganser, Copper Pheasant, Long-billed Plover, Slaty-backed Gull, Eurasian Siskin, Common Reed Bunting |
| 4 | シメさんチーム | 7 | White-bellied Green Pigeon, Japanese Sparrowhawk, White-backed Woodpecker, Willow Tit, Eurasian Nuthatch, Eurasian Treecreeper, Russet Sparrow |
| 5 | E.G.awakun | 5 | Common Moorhen, Spotted Redshank, Vega Gull, Common Kestrel, Brown Dipper |
| 5 | 本気(マジ)ロクロハラアジサシ | 5 | Tundra Swan, Whooper Swan, Common Ringed Plover, Peregrine Falcon, Grey Bunting |
| 7 | 杉山 | 4 | Cackling Goose, Swinhoe’s Snipe, Chestnut-cheeked Starling, Daurian Redstart |
| 8 | natsume | 3 | Latham’s Snipe, Japanese Leaf Warbler, White-shouldered Starling |
Achievements#
⏱ BH#
(1時間部門/The Big Hour )
| Rank | Team | Species |
|---|---|---|
| 1🥇 | 杉山 | 42 |
🪑 BS#
(1か所部門/The Big Sit)
| Rank | Team | Species |
|---|---|---|
| 1🥇 | ねり | 16 |
🚶 LF#
(低化石部門/Low Fossil)
| Rank | Team | Species |
|---|---|---|
| 1🥇 | natsume | 64 |
| 2🥈 | 妖怪ファミリー | 19 |
| 3🥉 | ねり | 16 |
Observed species#
Observed species (native species)
- Japanese Sparrowhawk (Accipiter gularis)
- Grey-faced Buzzard (Butastur indicus)
- Eastern Buzzard (Buteo japonicus)
- Black Kite (Milvus migrans)
- Western Osprey (Pandion haliaetus)
- Mandarin Duck (Aix galericulata)
- Eastern Spot-billed Duck (Anas zonorhyncha)
- Mallard (Anas platyrhynchos)
- Northern Pintail (Anas acuta)
- Eurasian Teal (Anas crecca)
- Common Pochard (Aythya ferina)
- Tufted Duck (Aythya fuligula)
- Greater Scaup (Aythya marila)
- Brant Goose (Branta bernicla)
- Cackling Goose (Branta hutchinsii)
- Common Goldeneye (Bucephala clangula)
- Tundra Swan (Cygnus columbianus)
- Whooper Swan (Cygnus cygnus)
- Gadwall (Mareca strepera)
- Falcated Duck (Mareca falcata)
- Eurasian Wigeon (Mareca penelope)
- Black Scoter (Melanitta americana)
- Common Merganser (Mergus merganser)
- Red-breasted Merganser (Mergus serrator)
- Garganey (Spatula querquedula)
- Northern Shoveler (Spatula clypeata)
- Common Shelduck (Tadorna tadorna)
- Pacific Swift (Apus pacificus)
- Grey Nightjar (Caprimulgus jotaka) New
- Common Ringed Plover (Charadrius hiaticula)
- Long-billed Plover (Charadrius placidus)
- Little Ringed Plover (Charadrius dubius)
- Kentish Plover (Charadrius alexandrinus)
- Lesser Sand Plover (Charadrius mongolus)
- Pacific Golden Plover (Pluvialis fulva)
- Grey Plover (Pluvialis squatarola)
- Oriental Pratincole (Glareola maldivarum)
- Black-headed Gull (Chroicocephalus ridibundus)
- Black-tailed Gull (Larus crassirostris)
- Vega Gull (Larus vegae)
- Slaty-backed Gull (Larus schistisagus)
- Saunders’s Gull (Saundersilarus saundersi)
- Little Tern (Sternula albifrons)
- Black-winged Stilt (Himantopus himantopus)
- Common Sandpiper (Actitis hypoleucos)
- Ruddy Turnstone (Arenaria interpres)
- Broad-billed Sandpiper (Calidris falcinellus) New
- Sharp-tailed Sandpiper (Calidris acuminata)
- Curlew Sandpiper (Calidris ferruginea) New
- Red-necked Stint (Calidris ruficollis)
- Dunlin (Calidris alpina)
- Latham’s Snipe (Gallinago hardwickii)
- Swinhoe’s Snipe (Gallinago megala) New
- Common Snipe (Gallinago gallinago)
- Bar-tailed Godwit (Limosa lapponica)
- Black-tailed Godwit (Limosa limosa)
- Whimbrel (Numenius phaeopus)
- Little Curlew (Numenius minutus)
- Far Eastern Curlew (Numenius madagascariensis)
- Green Sandpiper (Tringa ochropus)
- Grey-tailed Tattler (Tringa brevipes)
- Wood Sandpiper (Tringa glareola)
- Spotted Redshank (Tringa erythropus)
- Common Greenshank (Tringa nebularia)
- Terek Sandpiper (Xenus cinereus)
- Oriental Stork (Ciconia boyciana)
- Japanese Wood Pigeon (Columba janthina)
- Oriental Turtle Dove (Streptopelia orientalis)
- White-bellied Green Pigeon (Treron sieboldii)
- Common Kingfisher (Alcedo atthis)
- Oriental Dollarbird (Eurystomus orientalis)
- Indian Cuckoo (Cuculus micropterus) New
- Himalayan Cuckoo (Cuculus optatus)
- Common Kestrel (Falco tinnunculus)
- Amur Falcon (Falco amurensis) New
- Peregrine Falcon (Falco peregrinus)
- Green Pheasant (Phasianus versicolor)
- Copper Pheasant (Syrmaticus soemmerringii)
- Eurasian Coot (Fulica atra)
- Common Moorhen (Gallinula chloropus)
- Oriental Reed Warbler (Acrocephalus orientalis)
- Long-tailed Tit (Aegithalos caudatus)
- Eurasian Skylark (Alauda arvensis)
- Japanese Waxwing (Bombycilla japonica)
- Ashy Minivet (Pericrocotus divaricatus)
- Eurasian Treecreeper (Certhia familiaris)
- Japanese Bush Warbler (Horornis diphone)
- Asian Stubtail (Urosphena squameiceps)
- Brown Dipper (Cinclus pallasii)
- Zitting Cisticola (Cisticola juncidis)
- Carrion Crow (Corvus corone)
- Large-billed Crow (Corvus macrorhynchos)
- Azure-winged Magpie (Cyanopica cyanus)
- Eurasian Jay (Garrulus glandarius)
- Eurasian Magpie (Pica serica)
- Black Drongo (Dicrurus macrocercus) New
- Meadow Bunting (Emberiza cioides)
- Tristram’s Bunting (Emberiza tristrami)
- Chestnut-eared Bunting (Emberiza fucata)
- Yellow Bunting (Emberiza sulphurata)
- Black-faced Bunting (Emberiza spodocephala)
- Masked Bunting (Emberiza personata)
- Grey Bunting (Emberiza variabilis)
- Common Reed Bunting (Emberiza schoeniclus)
- Grey-capped Greenfinch (Chloris sinica)
- Hawfinch (Coccothraustes coccothraustes)
- Japanese Grosbeak (Eophona personata)
- Brambling (Fringilla montifringilla)
- Eurasian Siskin (Spinus spinus)
- Red-rumped Swallow (Cecropis daurica)
- Asian House Martin (Delichon dasypus)
- Barn Swallow (Hirundo rustica)
- Sand Martin (Riparia riparia)
- Bull-headed Shrike (Lanius bucephalus)
- Water Pipit (Anthus rubescens)
- Eastern Yellow Wagtail (Motacilla tschutschensis)
- Grey Wagtail (Motacilla cinerea)
- White Wagtail (Motacilla alba)
- Japanese Wagtail (Motacilla grandis)
- Blue-and-white Flycatcher (Cyanoptila cyanomelana)
- Yellow-rumped Flycatcher (Ficedula zanthopygia)
- Narcissus Flycatcher (Ficedula narcissina)
- Ryukyu Flycatcher (Ficedula owstoni)
- Siberian Blue Robin (Larvivora cyane)
- Blue Rock Thrush (Monticola solitarius)
- Asian Brown Flycatcher (Muscicapa dauurica)
- Daurian Redstart (Phoenicurus auroreus)
- Japanese Tit (Parus cinereus)
- Coal Tit (Periparus ater)
- Willow Tit (Poecile montanus)
- Varied Tit (Sittiparus varius)
- Russet Sparrow (Passer cinnamomeus)
- Eurasian Tree Sparrow (Passer montanus)
- Yellow-browed Warbler (Phylloscopus inornatus)
- Dusky Warbler (Phylloscopus fuscatus)
- Eastern Crowned Warbler (Phylloscopus coronatus)
- Sakhalin Leaf Warbler (Phylloscopus borealoides)
- Japanese Leaf Warbler (Phylloscopus xanthodryas) New
- Brown-eared Bulbul (Hypsipetes amaurotis)
- Light-vented Bulbul (Pycnonotus sinensis)
- Eurasian Nuthatch (Sitta europaea)
- Chestnut-cheeked Starling (Agropsar philippensis)
- White-cheeked Starling (Spodiopsar cineraceus)
- White-shouldered Starling (Sturnia sinensis)
- Eurasian Wren (Troglodytes troglodytes)
- Japanese Thrush (Turdus cardis)
- Eyebrowed Thrush (Turdus obscurus)
- Brown-headed Thrush (Turdus chrysolaus)
- Dusky Thrush (Turdus eunomus)
- Japanese White-eye (Zosterops japonicus)
- Grey Heron (Ardea cinerea)
- Great Egret (Ardea alba)
- Intermediate Egret (Ardea intermedia)
- Chinese Pond Heron (Ardeola bacchus)
- Eastern Cattle Egret (Bubulcus ibis)
- Striated Heron (Butorides striata)
- Little Egret (Egretta garzetta)
- Chinese Egret (Egretta eulophotes)
- Black-crowned Night Heron (Nycticorax nycticorax)
- Eurasian Spoonbill (Platalea leucorodia)
- Black-faced Spoonbill (Platalea minor)
- Great Spotted Woodpecker (Dendrocopos major)
- White-backed Woodpecker (Dendrocopos leucotos)
- Japanese Green Woodpecker (Picus awokera)
- Japanese Pygmy Woodpecker (Yungipicus kizuki)
- Great Crested Grebe (Podiceps cristatus)
- Little Grebe (Tachybaptus ruficollis)
- Streaked Shearwater (Calonectris leucomelas)
- Japanese Cormorant (Phalacrocorax capillatus)
- Great Cormorant (Phalacrocorax carbo)
Observed species (non-native species)
- Feral pigeon (Columba livia)
- Red-billed Leiothrix (Leiothrix lutea)
- Rose-ringed Parakeet (Psittacula krameri)
Others#
Prefectures|Goldenweek BigDay 2026