Denmark Ramsar wetland
Ertholmene
233 bird species recorded; the most in May.
7alaskan · CC BY-SA 3.0
This month here
13 species in January.28 species in February.90 species in March.121 species in April.191 species in May.144 species in June.58 species in July.127 species in August.150 species in September.166 species in October.105 species in November.16 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.
NT
NT
NT
NT
NT
NT
- Resident all year
- Summer visitor comes to breed
- Winter visitor comes for the winter
- Passage migrant in spring and autumn
In numbers
233 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).
- 233Speciesrecorded more than once
- 145Migrantssummer, winter or passage visitors
- 10ThreatenedVulnerable, Endangered or Critically Endangered (IUCN)
- 52,714Recordsopen records within 6 km
- 15Raptors
- 2Owls
- 27Waders
- 22Gulls & seabirds
- 28Ducks & geese
- 7Herons, ibises & grebes
- 1Storks & cranes
- 114Songbirds
- 17Other 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 233 species.
By group, with the year in twelve cells: the darker the cell, the more often the bird is recorded that month.
Raptors15 species
JFMAMJJASOND
- Eurasian SparrowhawkAccipiter nisus
- Common KestrelFalco tinnunculus
- Peregrine FalconFalco peregrinus
- European HobbyFalco subbuteo
- MerlinFalco columbarius
- Rough-legged BuzzardButeo lagopus
- European Honey-buzzardPernis apivorus
- Western Marsh HarrierCircus aeruginosus
- Hen HarrierCircus cyaneus
- Red KiteMilvus milvus
- OspreyPandion haliaetus
- Common BuzzardButeo buteo
- White-tailed EagleHaliaeetus albicilla
- Pallid HarrierCircus macrourusNT
- Red-footed FalconFalco vespertinusVU
Owls2 species
JFMAMJJASOND
- Short-eared OwlAsio flammeus
- Long-eared OwlAsio otus
Waders27 species
JFMAMJJASOND
- Common SandpiperActitis hypoleucos
- Green SandpiperTringa ochropus
- Common GreenshankTringa nebularia
- DunlinCalidris alpinaNT
- Common SnipeGallinago gallinago
- Eurasian WhimbrelNumenius phaeopus
- Eurasian WoodcockScolopax rusticola
- RedshankTringa totanus
- Common Ringed PloverCharadrius hiaticula
- Northern LapwingVanellus vanellusNT
- Eurasian OystercatcherHaematopus ostralegusNT
- Wood SandpiperTringa glareola
- European Golden PloverPluvialis apricaria
- Jack SnipeLymnocryptes minimus
- Eurasian CurlewNumenius arquataNT
- Purple SandpiperCalidris maritima
- Grey PloverPluvialis squatarolaVU
- RuffCalidris pugnax
- Ruddy TurnstoneArenaria interpresNT
- Spotted RedshankTringa erythropus
- SanderlingCalidris alba
- Bar-tailed godwitLimosa lapponicaNT
- Little StintCalidris minuta
- Pied AvocetRecurvirostra avosetta
- Eurasian DotterelCharadrius morinellus
- Curlew SandpiperCalidris ferrugineaVU
- Red KnotCalidris canutusNT
Gulls & seabirds22 species
JFMAMJJASOND
- European Herring GullLarus argentatus
- Common GullLarus canus
- Great Black-backed GullLarus marinus
- RazorbillAlca torda
- Common MurreUria aalge
- Black-headed GullChroicocephalus ridibundus
- Lesser Black-backed GullLarus fuscus
- Pontic gullLarus cachinnans
- Arctic TernSterna paradisaea
- Common TernSterna hirundo
- Little GullHydrocoloeus minutus
- Black-throated DiverGavia arctica
- Black GuillemotCepphus grylle
- Sandwich TernThalasseus sandvicensis
- Northern gannetMorus bassanus
- Red-throated LoonGavia stellata
- Arctic SkuaStercorarius parasiticus
- Caspian TernHydroprogne caspia
- Atlantic PuffinFratercula arcticaVU
- Glaucous GullLarus hyperboreus
- Black-legged kittiwakeRissa tridactylaVU
- Yellow-legged GullLarus michahellis
Ducks & geese28 species
JFMAMJJASOND
- Red-breasted MerganserMergus serrator
- Mute SwanCygnus olor
- Common EiderSomateria mollissimaNT
- MallardAnas platyrhynchos
- Greylag GooseAnser anser
- GadwallMareca strepera
- Canada GooseBranta canadensis
- Eurasian WigeonMareca penelope
- Eurasian TealAnas crecca
- Barnacle GooseBranta leucopsis
- Long-tailed duckClangula hyemalisVU
- Common ShelduckTadorna tadorna
- Common ScoterMelanitta nigra
- Greater White-fronted GooseAnser albifrons
- GoosanderMergus merganser
- Brent GooseBranta bernicla
- Tufted DuckAythya fuligula
- Greater ScaupAythya marila
- Northern ShovelerSpatula clypeata
- Tundra Bean GooseAnser serrirostris
- Common GoldeneyeBucephala clangula
- Northern PintailAnas acuta
- Velvet scoterMelanitta fuscaVU
- Whooper SwanCygnus cygnus
- Bewick's SwanCygnus columbianus
- GarganeySpatula querquedula
- Ruddy ShelduckTadorna ferruginea
- Common PochardAythya ferinaVU
Herons, ibises & grebes7 species
JFMAMJJASOND
- Great CormorantPhalacrocorax carbo
- Grey HeronArdea cinerea
- Great White EgretArdea alba
- Great Crested GrebePodiceps cristatus
- Little GrebeTachybaptus ruficollis
- Horned GrebePodiceps auritusVU
- Little EgretEgretta garzetta
Storks & cranes1 species
JFMAMJJASOND
- Common CraneGrus grus
Songbirds114 species
JFMAMJJASOND
- Eurasian BlackbirdTurdus merula
- Hooded CrowCorvus cornix
- House SparrowPasser domesticus
- Eurasian ChaffinchFringilla coelebs
- European RobinErithacus rubecula
- Common ChiffchaffPhylloscopus collybita
- White WagtailMotacilla alba
- Song ThrushTurdus philomelos
- Common StarlingSturnus vulgaris
- Eurasian WrenTroglodytes troglodytes
- BlackcapSylvia atricapilla
- Common LinnetLinaria cannabina
- Barn swallowHirundo rustica
- Lesser whitethroatSylvia curruca
- Willow WarblerPhylloscopus trochilus
- Great titParus major
- Eurasian SiskinSpinus spinus
- DunnockPrunella modularis
- GoldcrestRegulus regulus
- Common RedstartPhoenicurus phoenicurus
- WhitethroatSylvia communis
- SkylarkAlauda arvensis
- Common House MartinDelichon urbicum
- Meadow PipitAnthus pratensis
- Spotted FlycatcherMuscicapa striata
- BramblingFringilla montifringilla
- Garden WarblerSylvia borin
- RedwingTurdus iliacus
- European Pied FlycatcherFicedula hypoleuca
- Tree PipitAnthus trivialis
- Eurasian Blue TitCyanistes caeruleus
- Icterine warblerHippolais icterina
- Common Reed BuntingEmberiza schoeniclus
- Red-breasted flycatcherFicedula parva
- RookCorvus frugilegus
- European GoldfinchCarduelis carduelis
- Black RedstartPhoenicurus ochruros
- FieldfareTurdus pilaris
- Red-backed ShrikeLanius collurio
- Eurasian Reed WarblerAcrocephalus scirpaceus
- Western Yellow WagtailMotacilla flava
- Northern WheatearOenanthe oenanthe
- WhinchatSaxicola rubetra
- Mistle ThrushTurdus viscivorus
- BullfinchPyrrhula pyrrhula
- Wood WarblerPhylloscopus sibillatrix
- HawfinchCoccothraustes coccothraustes
- Marsh warblerAcrocephalus palustris
- Common RedpollAcanthis flammea
- European GreenfinchChloris chloris
- Sand MartinRiparia riparia
- YellowhammerEmberiza citrinella
- Eurasian TreecreeperCerthia familiaris
- Common RosefinchCarpodacus erythrinus
- Thrush NightingaleLuscinia luscinia
- Common FirecrestRegulus ignicapilla
- Common crossbillLoxia curvirostra
- WoodlarkLullula arborea
- Lanius excubitorLanius excubitor
- Sedge WarblerAcrocephalus schoenobaenus
- TwiteLinaria flavirostris
- Common Grasshopper WarblerLocustella naevia
- BluethroatLuscinia svecica
- Carrion CrowCorvus corone
- Greenish WarblerPhylloscopus trochiloides
- Coal TitPeriparus ater
- Western JackdawColoeus monedula
- Bohemian WaxwingBombycilla garrulus
- Yellow-browed WarblerPhylloscopus inornatus
- Ring OuzelTurdus torquatus
- Northern RavenCorvus corax
- Snow BuntingPlectrophenax nivalis
- European Rock PipitAnthus petrosus
- Barred WarblerSylvia nisoria
- Eurasian Tree SparrowPasser montanus
- Blyth’s Reed WarblerAcrocephalus dumetorum
- Pallas's Leaf WarblerPhylloscopus proregulus
- Grey WagtailMotacilla cinerea
- European SerinSerinus serinus
- Collared FlycatcherFicedula albicollis
- Ortolan buntingEmberiza hortulana
- Parrot CrossbillLoxia pytyopsittacus
- European StonechatSaxicola rubicola
- Eurasian Golden OrioleOriolus oriolus
- Black-headed buntingEmberiza melanocephala
- Bearded ReedlingPanurus biarmicus
- Eurasian MagpiePica pica
- Corn BuntingEmberiza calandra
- Lapland LongspurCalcarius lapponicus
- Sulphur-bellied WarblerPhylloscopus griseolus
- Little BuntingEmberiza pusilla
- Eurasian River WarblerLocustella fluviatilis
- Hume’s leaf-warblerPhylloscopus humei
- Eurasian Penduline TitRemiz pendulinus
- Pine BuntingEmberiza leucocephalos
- Rustic BuntingEmberiza rusticaNT
- Siberian AccentorPrunella montanella
- Red-throated PipitAnthus cervinus
- Booted WarblerIduna caligata
- Greater Short-toed LarkCalandrella brachydactyla
- Dusky warblerPhylloscopus fuscatus
- Rosy StarlingPastor roseus
- Shore LarkEremophila alpestris
- Western Subalpine WarblerCurruca iberiae
- Crested larkGalerida cristata
- Red-flanked BluetailTarsiger cyanurus
- Great Reed WarblerAcrocephalus arundinaceus
- Siberian stonechatSaxicola maurus
- Common BulbulPycnonotus barbatus
- Tawny PipitAnthus campestris
- Hermit ThrushCatharus guttatus
- Radde’s warblerPhylloscopus schwarzi
- Western Bonelli's WarblerPhylloscopus bonelli
- Eastern Subalpine WarblerCurruca cantillans
Other birds17 species
JFMAMJJASOND
- Common Wood PigeonColumba palumbus
- European SwiftApus apus
- Great Spotted WoodpeckerDendrocopos major
- Rock DoveColumba livia
- Stock DoveColumba oenas
- Common MoorhenGallinula chloropus
- European NightjarCaprimulgus europaeus
- Common CuckooCuculus canorus
- Eurasian Collared DoveStreptopelia decaocto
- WryneckJynx torquilla
- CootFulica atra
- European Turtle DoveStreptopelia turturVU
- European Water RailRallus aquaticus
- Eurasian HoopoeUpupa epops
- Oriental Turtle DoveStreptopelia orientalis
- Bee-eaterMerops apiaster
- Common KingfisherAlcedo atthis
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 May.
Species recorded in each month, with the usual temperature and rain.
- Jan3°/2°60 mm
- Feb3°/1°48 mm
- Mar4°/2°42 mm
- Apr6°/4°32 mm
- May10°/9°42 mm
- Jun15°/13°46 mm
- Jul18°/17°69 mm
- Aug19°/17°70 mm
- Sep16°/15°56 mm
- Oct12°/10°70 mm
- Nov8°/7°69 mm
- Dec5°/4°65 mm
- Bar: species recorded that month.
- Temperature: average maximum / minimum (NASA, 1991–2020).
- Rain: monthly total.
The place
Ertholmene.
Small Danish archipelago east of Bornholm
Ertholmene is a wetland of international importance (Ramsar) in Denmark.
233 bird species have been recorded here more than once, in 52,714 open records.
The most recorded are the European Herring Gull, the Eurasian Blackbird and the Common Wood Pigeon.
85 species come for the summer, 47 for the winter and 13 only pass through.
10 are threatened worldwide, including Long-tailed duck, Velvet scoter and Grey Plover.
The most species are recorded in May.
Get there and watch
- Official informationAccess, hours and rules from those who manage the place.Official site↗
- Christiansø teltpladscampsite · 0.3 km · 2 within 10 km
- Christiansø Gæstgiveriplace to stay · 0.1 km · 1 within 10 km
- Christiansønearest town · 0.2 km in a straight line
- Bornholm Airport (RNN)nearest airport with scheduled flights · 39 km in a straight lineCar hire at MMX airport (Malmö)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
- 1visitor centres within 6 kmSirenehuset
- 3viewpoints within 5 km
- 2restaurants and cafés within 3 km
- 2campsites within 10 kmChristiansø teltplads
- 1places to stay within 10 kmChristiansø Gæstgiveri
- bird hides within 6 km
- observation towers within 6 km
- marked trails within 4 km
- car parks within 3 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 Ertholmene.
The lakes, beaches, islands, rivers and mountains around this place, and its night sky, in the family's atlases.
Peakyas1 mountains within 25 kmBokul · 18 km
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.
Ertholmene
Denmark
- 87Birdyas Score
- 233Species
- 145Migrants
- 10Threatened
Ottenby bird observatory
Sweden · 124 km
- 92Birdyas Score
- 405Species
- 252Migrants
- 25Threatened
Where these figures come from
| Name and type | Wikidata (Q502678) · CC0 |
|---|---|
| Birds | 52,714 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, Darkskyas |
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.
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Every island from the sea up: size, sea temperature, ferries and 3D.Visit 
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Every river from source to sea: the journey, the flow and the basin in numbers.Visit 
canyons
Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Visit 
caves
Every cave with its real depth and length: the rock above, the temperature inside all year, and how to visit.Visit 
dark skies
Where the night is still dark: the sky of every place, the Milky Way month by month, the Moon, eclipses and auroras.Visit 
viewpoints
Every viewpoint with its real 360° panorama: the peaks you can name, how far you see and where the sun sets.Coming soonVisit 
birdwatching
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forests
Every forest with its land-cover rings, what grows and lives in it, and the best months to walk it.Coming soonVisit