Japan Ramsar wetland
Kasai Marine Park
218 bird species recorded; the most in February, in April, in October and in December.
しんぎんぐきゃっと · CC BY-SA 4.0
This month here
128 species in January.135 species in February.130 species in March.144 species in April.128 species in May.91 species in June.99 species in July.109 species in August.125 species in September.141 species in October.123 species in November.134 species in December.
The birds you are most likely to see in the month you choose, those that come for the season first. It opens on today's month.





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- Resident all year
- Summer visitor comes to breed
- Winter visitor comes for the winter
- Passage migrant in spring and autumn
In numbers
218 species, counted.
Our own rating, from the records only: species (50 points), threatened species (20), migrants (20) and protected status — Ramsar, IBA, SPA, observatory (10).
- 218Speciesrecorded more than once
- 134Migrantssummer, winter or passage visitors
- 10ThreatenedVulnerable, Endangered or Critically Endangered (IUCN)
- 112,083Recordsopen records within 6 km
- 10Raptors
- 2Owls
- 47Waders
- 19Gulls & seabirds
- 25Ducks & geese
- 20Herons, ibises & grebes
- 74Songbirds
- 21Other birds
From open records (eBird and others, through GBIF, licensed for any use). More birdwatchers mean more records: a quiet place may have more birds than it shows.
The checklist
All 218 species.
By group, with the year in twelve cells: the darker the cell, the more often the bird is recorded that month.
Raptors10 species
- Black KiteMilvus migrans
- OspreyPandion haliaetus
- Japanese BuzzardButeo japonicus
- Eurasian SparrowhawkAccipiter nisus
- Eastern Marsh-harrierCircus spilonotus
- Common KestrelFalco tinnunculus
- Grey-faced BuzzardButastur indicus
- Hen HarrierCircus cyaneus
- Common BuzzardButeo buteo
- European HobbyFalco subbuteo
Owls2 species
- Short-eared OwlAsio flammeus
- Long-eared OwlAsio otus
Waders47 species
- Common SandpiperActitis hypoleucos
- Gray-tailed TattlerTringa brevipes
- Common GreenshankTringa nebularia
- Eurasian OystercatcherHaematopus ostralegusNT
- Kentish PloverCharadrius alexandrinus
- Eurasian CurlewNumenius arquataNT
- Eurasian WhimbrelNumenius phaeopus
- DunlinCalidris alpinaNT
- Far Eastern CurlewNumenius madagascariensis
- Black-winged StiltHimantopus himantopus
- Common SnipeGallinago gallinago
- Terek SandpiperXenus cinereus
- Ruddy TurnstoneArenaria interpresNT
- Little ringed ploverCharadrius dubius
- Grey PloverPluvialis squatarolaVU
- Bar-tailed godwitLimosa lapponicaNT
- Red-necked StintCalidris ruficollisNT
- Charadrius mongolusCharadrius mongolus
- Pacific Golden PloverPluvialis fulva
- SanderlingCalidris alba
- RedshankTringa totanus
- Great KnotCalidris tenuirostris
- Black-tailed GodwitLimosa limosaNT
- Marsh SandpiperTringa stagnatilis
- Long-billed dowitcherLimnodromus scolopaceusNT
- Green SandpiperTringa ochropus
- Sharp-tailed SandpiperCalidris acuminataVU
- Wood SandpiperTringa glareola
- Broad-billed SandpiperCalidris falcinellusVU
- RuffCalidris pugnax
- Spotted RedshankTringa erythropus
- Japanese SnipeGallinago hardwickiiNT
- Eurasian WoodcockScolopax rusticola
- Long-toed StintCalidris subminuta
- Red-necked PhalaropePhalaropus lobatus
- Northern LapwingVanellus vanellusNT
- Oriental PratincoleGlareola maldivarum
- Red KnotCalidris canutusNT
- Long-billed PloverCharadrius placidus
- Asian DowitcherLimnodromus semipalmatusNT
- Curlew SandpiperCalidris ferrugineaVU
- Greater Painted-snipeRostratula benghalensis
- Common Ringed PloverCharadrius hiaticula
- Temminck's StintCalidris temminckii
- Little CurlewNumenius minutus
- Grey-headed LapwingVanellus cinereus
- Wandering (Alaskan) TattlerTringa incana
Gulls & seabirds19 species
- Black-tailed GullLarus crassirostris
- Black-headed GullChroicocephalus ridibundus
- Slaty-backed GullLarus schistisagus
- Vega GullLarus vegae
- Little TernSternula albifrons
- Common TernSterna hirundo
- Common GullLarus canus
- Saunders's GullChroicocephalus saundersi
- Streaked ShearwaterCalonectris leucomelasNT
- Caspian TernHydroprogne caspia
- Red-throated LoonGavia stellata
- Lesser Black-backed GullLarus fuscus
- Glaucous GullLarus hyperboreus
- Glaucous-winged GullLarus glaucescens
- Whiskered TernChlidonias hybrida
- Lesser FrigatebirdFregata ariel
- European Herring GullLarus argentatus
- Black-footed AlbatrossPhoebastria nigripesNT
- Pacific LoonGavia pacifica
Ducks & geese25 species
- Chinese Spot-billed DuckAnas zonorhyncha
- Greater ScaupAythya marila
- Eurasian TealAnas crecca
- Tufted DuckAythya fuligula
- Eurasian WigeonMareca penelope
- Northern ShovelerSpatula clypeata
- MallardAnas platyrhynchos
- Common PochardAythya ferinaVU
- GadwallMareca strepera
- Red-breasted MerganserMergus serrator
- Northern PintailAnas acuta
- Common GoldeneyeBucephala clangula
- Falcated DuckMareca falcata
- Anas poecilorhynchaAnas poecilorhyncha
- SmewMergellus albellus
- American ScoterMelanitta americanaNT
- GoosanderMergus merganser
- Baikal TealSibirionetta formosa
- GarganeySpatula querquedula
- Stejneger's ScoterMelanitta stejnegeri
- Mute SwanCygnus olor
- Mandarin DuckAix galericulata
- Velvet scoterMelanitta fuscaVU
- American WigeonMareca americana
- Bewick's SwanCygnus columbianus
Herons, ibises & grebes20 species
- Great CormorantPhalacrocorax carbo
- Grey HeronArdea cinerea
- Little EgretEgretta garzetta
- Great White EgretArdea alba
- Little GrebeTachybaptus ruficollis
- Great Crested GrebePodiceps cristatus
- Eared GrebePodiceps nigricollis
- Black-faced SpoonbillPlatalea minorVU
- Black-crowned Night-HeronNycticorax nycticorax
- Egretta intermediaEgretta intermedia
- Japanese CormorantPhalacrocorax capillatus
- Horned GrebePodiceps auritusVU
- Eurasian SpoonbillPlatalea leucorodia
- Red-necked GrebePodiceps grisegena
- Striated HeronButorides striata
- Chinese EgretEgretta eulophotesVU
- Reef HeronEgretta sacra
- Chinese Pond HeronArdeola bacchus
- Eurasian BitternBotaurus stellaris
- Japanese Night-heronGorsachius goisagiVU
Songbirds74 species
- Brown-eared BulbulHypsipetes amaurotis
- Eurasian Tree SparrowPasser montanus
- White-cheeked StarlingSpodiopsar cineraceus
- Large-billed CrowCorvus macrorhynchos
- White WagtailMotacilla alba
- Cinereous TitParus cinereus
- Zosterops japonicusZosterops japonicus
- Carrion CrowCorvus corone
- Azure-winged MagpieCyanopica cyanus
- Grey-capped GreenfinchChloris sinica
- Japanese Bush WarblerHorornis diphone
- Masked buntingEmberiza personata
- Turdus eunomusTurdus eunomus
- Barn swallowHirundo rustica
- Bull-headed ShrikeLanius bucephalus
- Daurian RedstartPhoenicurus auroreus
- Pale ThrushTurdus pallidus
- SkylarkAlauda arvensis
- Blue Rock ThrushMonticola solitarius
- Common Reed BuntingEmberiza schoeniclus
- Oriental Reed WarblerAcrocephalus orientalis
- Brown-headed ThrushTurdus chrysolaus
- Japanese WagtailMotacilla grandis
- Zitting CisticolaCisticola juncidis
- Asian House MartinDelichon dasypus
- Olive-backed PipitAnthus hodgsoni
- Poecile variusPoecile varius
- Meadow BuntingEmberiza cioides
- Narcissus FlycatcherFicedula narcissina
- Grey WagtailMotacilla cinerea
- Chestnut-cheeked StarlingAgropsar philippensis
- HawfinchCoccothraustes coccothraustes
- Japanese WaxwingBombycilla japonicaNT
- Red-flanked BluetailTarsiger cyanurus
- GoldcrestRegulus regulus
- Eurasian JayGarrulus glandarius
- Grey-streaked FlycatcherMuscicapa griseisticta
- White's ThrushZoothera aurea
- Grey BuntingEmberiza variabilis
- Eastern Crowned Leaf WarblerPhylloscopus coronatus
- Coal TitPeriparus ater
- Bohemian WaxwingBombycilla garrulus
- HwameiGarrulax canorus
- BullfinchPyrrhula pyrrhula
- Sakhalin Leaf-warblerPhylloscopus borealoides
- Muscicapa latirostrisMuscicapa latirostris
- Ashy MinivetPericrocotus divaricatus
- Kamchatka Leaf WarblerPhylloscopus examinandus
- BramblingFringilla montifringilla
- Rustic BuntingEmberiza rusticaNT
- Blue-and-white FlycatcherCyanoptila cyanomelana
- Ochre-rumped BuntingEmberiza yessoensisNT
- Dusky warblerPhylloscopus fuscatus
- Stejneger's StonechatSaxicola stejnegeri
- Great titParus major
- RookCorvus frugilegus
- Black-faced buntingEmberiza spodocephala
- Japanese GrosbeakEophona personata
- Eurasian SiskinSpinus spinus
- Long-tailed RosefinchCarpodacus sibiricus
- Turdus naumanniTurdus naumanni
- Eastern Red-rumped SwallowCecropis daurica
- Japanese Paradise-FlycatcherTerpsiphone atrocaudata
- Eurasian WrenTroglodytes troglodytes
- Red-billed StarlingSpodiopsar sericeus
- Ryukyu MinivetPericrocotus tegimae
- Eyebrowed thrushTurdus obscurus
- Chestnut-eared BuntingEmberiza fucata
- Red-breasted flycatcherFicedula parva
- Asian StubtailUrosphena squameiceps
- Black-browed Reed WarblerAcrocephalus bistrigiceps
- Sand MartinRiparia riparia
- Buff-bellied PipitAnthus rubescens
- Japanese Leaf WarblerPhylloscopus xanthodryas
Other birds21 species
- Rock DoveColumba livia
- Oriental Turtle DoveStreptopelia orientalis
- CootFulica atra
- Common KingfisherAlcedo atthis
- Japanese Pygmy WoodpeckerYungipicus kizuki
- Common MoorhenGallinula chloropus
- Ruddy-breasted CrakePorzana fusca
- Eastern Water RailRallus indicus
- House SwiftApus nipalensis
- Great Spotted WoodpeckerDendrocopos major
- WryneckJynx torquilla
- Pacific SwiftApus pacificus
- BudgerigarMelopsittacus undulatus
- Oriental CuckooCuculus optatus
- Baillon's CrakePorzana pusilla
- Japanese Green WoodpeckerPicus awokera
- White-bellied Green-PigeonTreron sieboldii
- Green PheasantPhasianus versicolor
- Rose-ringed ParakeetPsittacula krameri
- Lesser CuckooCuculus poliocephalus
- Japanese QuailCoturnix japonicaNT
Monthly presence relative to all bird records that month, so a busy month does not inflate every species.
When to go
The most species in February, in April, in October and in December.
Species recorded in each month, with the usual temperature and rain.
- Jan9°/1°80 mm
- Feb10°/1°75 mm
- Mar13°/4°124 mm
- Apr18°/9°135 mm
- May23°/14°148 mm
- Jun26°/18°185 mm
- Jul29°/22°152 mm
- Aug30°/23°134 mm
- Sep27°/20°211 mm
- Oct22°/14°246 mm
- Nov17°/9°120 mm
- Dec11°/3°83 mm
- Bar: species recorded that month.
- Temperature: average maximum / minimum (NASA, 1991–2020).
- Rain: monthly total.
The place
Kasai Marine Park.
Park in Japan
Kasai Marine Park is a wetland of international importance (Ramsar) in Japan.
218 bird species have been recorded here more than once, in 112,083 open records.
The most recorded are the Brown-eared Bulbul, the Great Cormorant and the Eurasian Tree Sparrow.
55 species come for the summer, 75 for the winter and 4 only pass through.
10 are threatened worldwide, including Common Pochard, Black-faced Spoonbill and Grey Plover.
The most species are recorded in February, in April, in October and in December.

Get there and watch
- Official informationAccess, hours and rules from those who manage the place.Official site↗
- 若洲キャンプ場campsite · 3.1 km · 4 within 10 km
- ホテルオークラ 東京ベイplace to stay · 2.0 km · 734 within 10 km
- Maihamanearest town · 2.0 km in a straight line
- Tokyo Haneda International Airport (HND)nearest airport with scheduled flights · 12 km in a straight lineCar hire at HND airport (Tokyo)Discover Cars · sponsored link↗
Plan the visit
A guided walk, a bed nearby, a car.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
From above
The place and its surroundings.
The satellite image of the 6 × 6 km around the place, with the bird hides, towers and trails that OpenStreetMap shows.

Around, in OpenStreetMap
- 12bird hides within 6 km行徳野鳥観察舎 あいねすと and 11 more
- 2visitor centres within 6 kmパークインフォメーション, 東京ディズニーリゾートウェルカムセンター Tokyo Disney Resort Welcome Center
- 5viewpoints within 5 km旧江戸川展望台, クリスタルビュー, 若洲展望台 and 2 more
- 291car parks within 3 km
- 147restaurants and cafés within 3 km
- 4campsites within 10 km若洲キャンプ場, 第二キャンプ場, 第一キャンプ場 and 1 more
- 734places to stay within 10 kmホテルオークラ 東京ベイ, 東京ディズニーシー・ホテルミラコスタ, Hotel Villa Fontaine and 731 more
- observation towers within 6 km
- marked trails within 4 km
Counted in OpenStreetMap, the map anyone can edit. A low number may just mean nobody has mapped it yet.
In our other atlases
Around Kasai Marine Park.
The lakes, beaches, islands, rivers and mountains around this place, and its night sky, in the family's atlases.
Figures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, OpenStreetMap). Links open when each site is online.
Photographs
The place, as people saw it.



Other places nearby.
Where these figures come from
| Name and type | Wikidata (Q49509425) · CC0 |
|---|---|
| Birds | 112,083 open bird records within 6 km (GBIF, CC0 and CC BY 4.0 only; mostly eBird, Cornell Lab of Ornithology) |
| See these records | gbif.org |
| Species | GBIF Backbone Taxonomy · CC BY 4.0; Wikidata (CC0); Wikimedia Commons |
| Altitude | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Temperature and rain | NASA POWER (CERES SYN1deg, 2001–2020; MERRA-2) |
| What is around | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Sister atlases | Peakyas, Islandyas |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers, canyons, caves, dark skies, viewpoints, birdwatching or forests?
Same idea, other landscapes: field atlases built on open data, in seven languages.



