Birds to See in Sweden in April
207 bird species on our list for Sweden are recorded regularly in April
Of these, the most often recorded are Woodpigeon, Great Tit, Chaffinch, Hooded Crow and Blackbird. New this month: Barn Swallow, Willow Warbler, Blackcap and Common Tern and 36 more.
On the move in April
GBIF · AprArriving
At their peak
From Sweden’s bird records, 2019–2024: arriving birds are regular this month but not last; leaving birds are regular this month but not next.
Other months
All 207 birds in April
207 birds
WoodpigeonColumba palumbusResidentCommon40–42 cmRecorded all year · 2.79% in Apr
Great TitParus majorResidentCommonRecorded all year · 2.64% in Apr
ChaffinchFringilla coelebsResidentCommon14–16 cmRecorded all year · 2.57% in Apr
Hooded CrowCorvus cornixResidentCommon44–51 cmRecorded all year · 2.51% in Apr
BlackbirdTurdus merulaResidentCommon24–25 cmRecorded all year · 2.44% in Apr
Blue TitCyanistes caeruleusResidentCommon11–12 cmRecorded all year · 2.41% in Apr
MallardAnas platyrhynchosResidentCommon50–65 cmRecorded all year · 2.39% in Apr
Greylag GooseAnser anserResidentCommon75–90 cmRecorded all year · 2.21% in Apr
Black-headed GullChroicocephalus ridibundusResidentCommon38–44 cmRecorded all year · 2.12% in Apr
Common GullLarus canusResidentCommon40–46 cmRecorded all year · 2.11% in Apr
Pied WagtailMotacilla albaSummer visitorCommon17–18 cmRegularly Mar–Oct · 2.09% in Apr
European RobinErithacus rubeculaResidentCommon13–14 cmRecorded all year · 2.05% in Apr
Common StarlingSturnus vulgarisResidentCommon21–23 cmRecorded all year · 1.77% in Apr
MagpiePica picaResidentCommon44–46 cmRecorded all year · 1.77% in Apr
JackdawColoeus monedulaResidentCommon34–39 cmRecorded all year · 1.68% in Apr
GoldeneyeBucephala clangulaResidentCommon40–51 cmRecorded all year · 1.59% in Apr
Northern LapwingVanellus vanellusSummer visitorCommon28–31 cmRegularly Feb–Nov · 1.46% in Apr
Mute SwanCygnus olorResidentCommon140–160 cmRecorded all year · 1.43% in Apr
GreenfinchChloris chlorisResidentCommon15–16 cmRecorded all year · 1.41% in Apr
Eurasian TealAnas creccaResidentCommon34–38 cmRecorded all year · 1.34% in Apr
Song ThrushTurdus philomelosSummer visitorCommon20–23 cmRegularly Mar–Nov · 1.33% in Apr
Eurasian NuthatchSitta europaeaResidentCommon12–15 cmRecorded all year · 1.29% in Apr
ChiffchaffPhylloscopus collybitaSummer visitorCommon10–12 cmRegularly Mar–Nov · 1.26% in Apr
Eurasian SkylarkAlauda arvensisSummer visitorCommon16–18 cmRegularly Feb–Nov · 1.25% in Apr
European Herring GullLarus argentatusResidentCommon55–67 cmRecorded all year · 1.24% in Apr
CootFulica atraResidentCommon36–42 cmRecorded all year · 1.24% in Apr
Great Spotted WoodpeckerDendrocopos majorResidentCommon23–26 cmRecorded all year · 1.17% in Apr
Canada GooseBranta canadensisResidentCommon76–110 cmRecorded all year · 1.16% in Apr
Tufted DuckAythya fuligulaResidentCommon40–47 cmRecorded all year · 1.15% in Apr
Great CormorantPhalacrocorax carboResidentCommon80–100 cmRecorded all year · 1.14% in Apr
Eurasian WrenTroglodytes troglodytesResidentCommon9–10 cmRecorded all year · 1.14% in Apr
Common CraneGrus grusSummer visitorCommon100–130 cmRegularly Feb–Oct · 1.10% in Apr
FieldfareTurdus pilarisResidentCommon22–27 cmRecorded all year · 1.02% in Apr
Eurasian OystercatcherHaematopus ostralegusSummer visitorCommon40–45 cmRegularly Feb–Nov · 0.98% in Apr
Common MerganserMergus merganserResidentCommon58–68 cmRecorded all year · 0.98% in Apr
Barnacle GooseBranta leucopsisResidentCommon58–70 cmRecorded all year · 0.95% in Apr
European GoldfinchCarduelis carduelisResidentCommon12–13 cmRecorded all year · 0.89% in Apr
Reed BuntingEmberiza schoeniclusSummer visitorCommon14–16 cmRecorded all year · 0.89% in Apr
Grey HeronArdea cinereaResidentCommon90–98 cmRecorded all year · 0.89% in Apr
Eurasian Tree SparrowPasser montanusResidentCommon13–14 cmRecorded all year · 0.88% in Apr
Common RavenCorvus coraxResidentCommon54–67 cmRecorded all year · 0.85% in Apr
BuzzardButeo buteoResidentCommon51–57 cmRecorded all year · 0.85% in Apr
Great Crested GrebePodiceps cristatusResidentCommon46–51 cmRecorded all year · 0.84% in Apr
YellowhammerEmberiza citrinellaResidentCommon16–17 cmRecorded all year · 0.81% in Apr
Meadow PipitAnthus pratensisSummer visitorCommon14–15 cmRecorded all year · 0.81% in Apr
Eurasian SiskinSpinus spinusResidentCommon11–13 cmRecorded all year · 0.79% in Apr
Eurasian WigeonMareca penelopeWinter visitorCommon42–51 cmRecorded all year · 0.79% in Apr
GadwallMareca streperaResidentCommon46–56 cmRecorded all year · 0.76% in Apr
LinnetLinaria cannabinaSummer visitorCommon13–14 cmRegularly Mar–Nov · 0.71% in Apr
Common PheasantPhasianus colchicusResidentCommon50–90 cmRecorded all year · 0.71% in Apr
RedshankTringa totanusSummer visitorCommon27–29 cmRecorded all year · 0.71% in Apr
Whooper SwanCygnus cygnusResidentCommon140–165 cmRecorded all year · 0.69% in Apr
Western Marsh-harrierCircus aeruginosusSummer visitorCommon48–56 cmRegularly Mar–Oct · 0.67% in Apr
Common ShelduckTadorna tadornaResidentCommon58–67 cmRecorded all year · 0.66% in Apr
Common SnipeGallinago gallinagoSummer visitorCommon25–27 cmRegularly Mar–Jan · 0.63% in Apr
Willow WarblerPhylloscopus trochilusSummer visitorCommon11–13 cmRegularly Apr–Sep · 0.60% in Apr
Northern ShovelerSpatula clypeataSummer visitorCommon44–51 cmRecorded all year · 0.58% in Apr
RedwingTurdus iliacusResidentCommon20–24 cmRecorded all year · 0.57% in Apr
Great Black-backed GullLarus marinusResidentCommon64–79 cmRecorded all year · 0.57% in Apr
CurlewNumenius arquataResidentCommon50–60 cmRecorded all year · 0.56% in Apr
White-tailed Sea-eagleHaliaeetus albicillaResidentCommon66–94 cmRecorded all year · 0.56% in Apr
RookCorvus frugilegusResidentCommon45–47 cmRecorded all year · 0.55% in Apr
DunnockPrunella modularisSummer visitorCommon14–15 cmRecorded all year · 0.54% in Apr
GoldcrestRegulus regulusWinter visitorCommon9–10 cmRecorded all year · 0.54% in Apr
EiderSomateria mollissimaResidentCommon50–71 cmRecorded all year · 0.53% in Apr
Green SandpiperTringa ochropusSummer visitorCommon21–24 cmRegularly Mar–Sep · 0.50% in Apr
Red KiteMilvus milvusResidentCommon60–66 cmRecorded all year · 0.50% in Apr
Lesser Black-backed GullLarus fuscusSummer visitorCommon52–64 cmRegularly Mar–Dec · 0.49% in Apr
House SparrowPasser domesticusResidentCommon14–17 cmRecorded all year · 0.49% in Apr
European Green WoodpeckerPicus viridisResidentCommon30–36 cmRecorded all year · 0.46% in Apr
Mistle ThrushTurdus viscivorusSummer visitorCommon27–28 cmRecorded all year · 0.45% in Apr
TreecreeperCerthia familiarisResidentCommon12–14 cmRecorded all year · 0.42% in Apr
KestrelFalco tinnunculusResidentCommon32–39 cmRecorded all year · 0.40% in Apr
OspreyPandion haliaetusSummer visitorCommon54–58 cmRegularly Mar–Sep · 0.39% in Apr
BramblingFringilla montifringillaWinter visitorCommon14–16 cmRecorded all year · 0.39% in Apr
Common TernSterna hirundoSummer visitorCommon31–35 cmRegularly Apr–Sep · 0.39% in Apr
SparrowhawkAccipiter nisusWinter visitorCommon28–38 cmRecorded all year · 0.38% in Apr
Red-breasted MerganserMergus serratorResidentCommon52–58 cmRecorded all year · 0.38% in Apr
Stock DoveColumba oenasSummer visitorUncommon32–34 cmRecorded all year · 0.38% in Apr
Barn SwallowHirundo rusticaSummer visitorCommon17–19 cmRegularly Apr–Oct · 0.37% in Apr
Rock DoveColumba liviaResidentCommon31–34 cmRecorded all year · 0.37% in Apr
Ringed PloverCharadrius hiaticulaSummer visitorCommon17–19 cmRegularly Feb–Oct · 0.37% in Apr
BlackcapSylvia atricapillaSummer visitorCommon13–15 cmRegularly Apr–Oct · 0.36% in Apr
Eurasian JayGarrulus glandariusWinter visitorCommon32–35 cmRecorded all year · 0.35% in Apr
WheatearOenanthe oenantheSummer visitorCommon15–16 cmRegularly Apr–Oct · 0.34% in Apr
BullfinchPyrrhula pyrrhulaWinter visitorCommon15–17 cmRecorded all year · 0.33% in Apr
Northern PintailAnas acutaWinter visitorCommon59–76 cmRecorded all year · 0.32% in Apr
HawfinchCoccothraustes coccothraustesResidentCommon17–18 cmRecorded all year · 0.31% in Apr
Marsh TitPoecile palustrisWinter visitorCommon12–13 cmRecorded all year · 0.30% in Apr
Coal TitPeriparus aterWinter visitorCommon10–12 cmRecorded all year · 0.30% in Apr
MoorhenGallinula chloropusResidentUncommon30–38 cmRecorded all year · 0.28% in Apr
AvocetRecurvirostra avosettaSummer visitorUncommon42–45 cmRegularly Mar–Nov · 0.27% in Apr
Common RedstartPhoenicurus phoenicurusSummer visitorCommon13–15 cmRegularly Apr–Oct · 0.26% in Apr
Common ScoterMelanitta nigraResidentUncommon43–54 cmRecorded all year · 0.25% in Apr
Sandwich TernThalasseus sandvicensisSummer visitorUncommon36–41 cmRegularly Mar–Oct · 0.24% in Apr
Red-necked GrebePodiceps grisegenaSummer visitorUncommon40–50 cmRecorded all year · 0.24% in Apr
Long-tailed TitAegithalos caudatusWinter visitorCommon13–16 cmRecorded all year · 0.23% in Apr
Greater White-fronted GooseAnser albifronsWinter visitorCommon64–81 cmRegularly Sep–May · 0.22% in Apr
Arctic LoonGavia arcticaSummer visitorUncommon58–77 cmRecorded all year · 0.21% in Apr
GreenshankTringa nebulariaSummer visitorCommon30–35 cmRegularly Apr–Nov · 0.21% in Apr
PochardAythya ferinaResidentUncommon42–49 cmRecorded all year · 0.20% in Apr
Eurasian BitternBotaurus stellarisSummer visitorUncommon69–81 cmRegularly Jan–Jul · 0.20% in Apr
Horned GrebePodiceps auritusSummer visitorUncommon31–38 cmRecorded all year · 0.20% in Apr
Lesser Spotted WoodpeckerDryobates minorResidentUncommon14–16 cmRecorded all year · 0.20% in Apr
RuffCalidris pugnaxSummer visitorCommon20–32 cmRegularly Apr–Oct · 0.20% in Apr
Little Ringed PloverThinornis dubiusSummer visitorUncommon14–17 cmRegularly Apr–Sep · 0.19% in Apr
Water RailRallus aquaticusResidentUncommon23–28 cmRecorded all year · 0.18% in Apr
SmewMergellus albellusWinter visitorUncommon38–44 cmRegularly Sep–May · 0.17% in Apr
Tree PipitAnthus trivialisSummer visitorCommon14–16 cmRegularly Apr–Oct · 0.17% in Apr
Common RedpollAcanthis flammeaWinter visitorCommon12–14 cmRecorded all year · 0.16% in Apr
Long-tailed DuckClangula hyemalisWinter visitorUncommon37–60 cmRegularly Sep–Jul · 0.15% in Apr
Little GrebeTachybaptus ruficollisResidentUncommon23–29 cmRecorded all year · 0.14% in Apr
Golden PloverPluvialis apricariaSummer visitorCommon26–29 cmRegularly Feb–Dec · 0.14% in Apr
Lesser WhitethroatCurruca currucaSummer visitorCommon11–13 cmRegularly Apr–Sep · 0.14% in Apr
Velvet ScoterMelanitta fuscaResidentUncommon51–58 cmRecorded all year · 0.14% in Apr
Red-throated LoonGavia stellataResidentUncommon53–69 cmRecorded all year · 0.13% in Apr
Taiga Bean GooseAnser fabalisWinter visitorUncommon68–88 cmRegularly Aug–May · 0.13% in Apr
WoodlarkLullula arboreaSummer visitorUncommon15–17 cmRecorded all year · 0.13% in Apr
GarganeySpatula querquedulaSummer visitorUncommon37–41 cmRegularly Mar–Sep · 0.13% in Apr
Hen HarrierCircus cyaneusWinter visitorCommon41–52 cmRegularly Aug–Jun · 0.12% in Apr
Eurasian WoodcockScolopax rusticolaSummer visitorUncommon33–38 cmRegularly Sep–Jul · 0.12% in Apr
Greater ScaupAythya marilaWinter visitorUncommon39–56 cmRecorded all year · 0.12% in Apr
European Pied FlycatcherFicedula hypoleucaSummer visitorCommon12–14 cmRegularly Apr–Aug · 0.12% in Apr
Red CrossbillLoxia curvirostraResidentUncommon15–17 cmRecorded all year · 0.12% in Apr
House MartinDelichon urbicumSummer visitorCommon13–15 cmRegularly Apr–Sep · 0.11% in Apr
Crested TitLophophanes cristatusResidentUncommon11–12 cmRecorded all year · 0.11% in Apr
Rough-legged HawkButeo lagopusWinter visitorCommon46–59 cmRegularly Jun–Apr · 0.11% in Apr
Yellow WagtailMotacilla flavaSummer visitorCommon15–17 cmRegularly Apr–Oct · 0.10% in Apr
Wood SandpiperTringa glareolaSummer visitorCommon19–21 cmRegularly Apr–Sep · 0.09% in Apr
Arctic TernSterna paradisaeaSummer visitorCommon33–39 cmRegularly Apr–Oct · 0.09% in Apr
Northern GoshawkAstur gentilisWinter visitorUncommon46–61 cmRecorded all year · 0.09% in Apr
Common SandpiperActitis hypoleucosSummer visitorCommon18–20 cmRegularly Apr–Sep · 0.09% in Apr
Willow TitPoecile montanusResidentUncommon11–12 cmRecorded all year · 0.09% in Apr
Great White EgretArdea albaWinter visitorUncommon80–104 cmRecorded all year · 0.09% in Apr
Black GuillemotCepphus grylleResidentUncommon30–32 cmRecorded all year · 0.09% in Apr
Grey WagtailMotacilla cinereaWinter visitorUncommon17–20 cmRecorded all year · 0.09% in Apr
Tawny OwlStrix alucoResidentUncommon37–43 cmRecorded all year · 0.08% in Apr
Eurasian Collared DoveStreptopelia decaoctoResidentUncommon30–32 cmRecorded all year · 0.08% in Apr
Ring OuzelTurdus torquatusSummer visitorUncommon23–24 cmRegularly Apr–Oct · 0.08% in Apr
Rock PipitAnthus petrosusWinter visitorUncommon16–18 cmRecorded all year · 0.08% in Apr
Pink-footed GooseAnser brachyrhynchusWinter visitorUncommon60–75 cmRegularly Sep–Jun · 0.08% in Apr
Bearded TitPanurus biarmicusResidentUncommon13–15 cmRecorded all year · 0.07% in Apr
Little TernSternula albifronsSummer visitorUncommon21–25 cmRegularly Apr–Sep · 0.07% in Apr
Black RedstartPhoenicurus ochrurosResidentUncommon13–15 cmRecorded all year · 0.07% in Apr
Great Grey ShrikeLanius excubitorWinter visitorUncommon22–26 cmRegularly Aug–Apr · 0.07% in Apr
DunlinCalidris alpinaSummer visitorCommon16–22 cmRecorded all year · 0.07% in Apr
WhimbrelNumenius phaeopusSummer visitorUncommon40–46 cmRegularly Apr–Sep · 0.07% in Apr
MerlinFalco columbariusSummer visitorUncommon24–33 cmRegularly Apr–Jan · 0.07% in Apr
Black-tailed GodwitLimosa limosaSummer visitorUncommon40–44 cmRegularly Jan–Nov · 0.06% in Apr
Black GrouseLyrurus tetrixResidentUncommon40–55 cmRecorded all year · 0.06% in Apr
WhinchatSaxicola rubetraSummer visitorUncommon12–14 cmRegularly Apr–Sep · 0.06% in Apr
RazorbillAlca tordaResidentUncommon38–43 cmRecorded all year · 0.06% in Apr
Bar-tailed GodwitLimosa lapponicaSummer visitorUncommon37–41 cmRegularly Mar–Nov · 0.06% in Apr
Wood WarblerPhylloscopus sibilatrixSummer visitorCommon11–13 cmRegularly Apr–Aug · 0.06% in Apr
European ShagGulosus aristotelisWinter visitorUncommon65–80 cmRecorded all year · 0.06% in Apr
Peregrine FalconFalco peregrinusWinter visitorUncommon34–58 cmRecorded all year · 0.06% in Apr
Common KingfisherAlcedo atthisWinter visitorUncommon16–17 cmRecorded all year · 0.05% in Apr
WryneckJynx torquillaSummer visitorUncommon16–18 cmRegularly Apr–Aug · 0.05% in Apr
Little GullHydrocoloeus minutusSummer visitorUncommon25–30 cmRegularly Apr–Feb · 0.05% in Apr
Arctic JaegerStercorarius parasiticusSummer visitorUncommon41–46 cmRegularly Mar–Nov · 0.05% in Apr
Northern GannetMorus bassanusWinter visitorUncommon87–100 cmRegularly Jul–May · 0.05% in Apr
Purple SandpiperCalidris maritimaWinter visitorUncommon20–22 cmRegularly Sep–May · 0.05% in Apr
StonechatSaxicola rubicolaResidentUncommon12–13 cmRecorded all year · 0.05% in Apr
Snow BuntingPlectrophenax nivalisWinter visitorUncommon15–18 cmRegularly Jul–Apr · 0.05% in Apr
Sand MartinRiparia ripariaSummer visitorUncommon12–14 cmRegularly Apr–Sep · 0.05% in Apr
Western CapercaillieTetrao urogallusResidentRare60–87 cmRecorded all year · 0.04% in Apr
TwiteLinaria flavirostrisWinter visitorUncommon13–14 cmRegularly Oct–Apr · 0.04% in Apr
Sedge WarblerAcrocephalus schoenobaenusSummer visitorCommon12–13 cmRegularly Apr–Sep · 0.04% in Apr
BluethroatLuscinia svecicaSummer visitorUncommon13–14 cmRegularly Apr–Sep · 0.04% in Apr
FirecrestRegulus ignicapillaWinter visitorUncommon9–10 cmRecorded all year · 0.04% in Apr
Short-eared OwlAsio flammeusSummer visitorUncommon34–43 cmRecorded all year · 0.04% in Apr
Grey PartridgePerdix perdixResidentUncommon28–32 cmRecorded all year · 0.03% in Apr
Tundra Bean GooseAnser serrirostrisWinter visitorUncommon66–84 cmRegularly Sep–Apr · 0.03% in Apr
Spotted RedshankTringa erythropusSummer visitorUncommon29–31 cmRegularly Apr–Nov · 0.03% in Apr
Carrion CrowCorvus coroneResidentRare45–47 cmRecorded all year · 0.03% in Apr
Red-breasted GooseBranta ruficollisPassage migrantRare53–56 cmRegularly Oct–May · 0.03% in Apr
Golden EagleAquila chrysaetosResidentUncommon66–102 cmRecorded all year · 0.03% in Apr
Jack SnipeLymnocryptes minimusWinter visitorUncommon17–19 cmRegularly Sep–Jun · 0.03% in Apr
Mandarin DuckAix galericulataWinter visitorUncommon41–49 cmRecorded all year · 0.03% in Apr
Black-necked GrebePodiceps nigricollisResidentRare28–34 cmRegularly Dec–Oct · 0.02% in Apr
Parrot CrossbillLoxia pytyopsittacusWinter visitorUncommon16–18 cmRecorded all year · 0.02% in Apr
Long-eared OwlAsio otusResidentUncommon35–40 cmRecorded all year · 0.02% in Apr
DipperCinclus cinclusWinter visitorUncommon17–20 cmRegularly Jun–Apr · 0.02% in Apr
KittiwakeRissa tridactylaWinter visitorUncommon37–41 cmRecorded all year · 0.02% in Apr
Lapland LongspurCalcarius lapponicusSummer visitorUncommon15–16 cmRegularly Apr–Feb · 0.02% in Apr
SerinSerinus serinusSummer visitorRare11–12 cmRegularly Mar–Oct · 0.02% in Apr
Tundra SwanCygnus columbianusWinter visitorUncommon120–150 cmRegularly Oct–Apr · 0.02% in Apr
Mediterranean GullIchthyaetus melanocephalusSummer visitorRare37–40 cmRegularly Mar–Oct · 0.01% in Apr
King EiderSomateria spectabilisPassage migrantRare46–64 cmRegularly Oct–May · 0.01% in Apr
Red-crested PochardNetta rufinaWinter visitorRare53–57 cmRegularly Sep–Jul · 0.01% in Apr
Savi's WarblerLocustella luscinioidesSummer visitorUncommon13–14 cmRegularly Apr–Aug · 0.01% in Apr
Spotted CrakePorzana porzanaSummer visitorRare19–23 cmRegularly Apr–Sep · 0.01% in Apr
HoopoeUpupa epopsPassage migrantRare25–32 cmRegularly Apr–Jan · 0.01% in Apr
Ruddy TurnstoneArenaria interpresSummer visitorUncommon21–24 cmRegularly Apr–Feb · 0.01% in Apr
Boreal OwlAegolius funereusPassage migrantUncommon21–28 cmRegularly Sep–Jun · 0.01% in Apr
SanderlingCalidris albaWinter visitorUncommon18–20 cmRegularly Jul–May · 0.01% in Apr
Short-toed TreecreeperCerthia brachydactylaWinter visitorRare12–14 cmRegularly Jul–May · 0.00% in Apr
Corn BuntingEmberiza calandraSummer visitorRare16–19 cmRegularly Oct–Aug · 0.00% in Apr
Eurasian SpoonbillPlatalea leucorodiaSummer visitorRare80–90 cmRegularly Apr–Jul · 0.00% in Apr
Horned LarkEremophila alpestrisWinter visitorUncommon16–20 cmRegularly Oct–Apr · 0.00% in Apr
Red-flanked BluetailTarsiger cyanurusPassage migrantRare13–14 cmRegularly Apr–Oct · 0.00% in Apr
Common LoonGavia immerPassage migrantRare66–91 cmRegularly Apr–Jan · 0.00% in Apr
Kentish PloverCharadrius alexandrinusPassage migrantRare15–17 cmRegularly Apr–May · 0.00% in Apr
Rock PtarmiganLagopus mutaSummer visitorRare34–36 cmRegularly Feb–Oct · 0.00% in Apr
Glaucous GullLarus hyperboreusPassage migrantRare62–68 cmRegularly Dec–Apr · 0.00% in Apr
Egyptian GooseAlopochen aegyptiacaPassage migrantRare63–73 cmRegularly Apr–Jun · 0.00% in Apr
Snow GooseAnser caerulescensPassage migrantRare69–84 cmRegularly Oct–Apr · 0.00% in Apr
Data: EOD – eBird Observation Dataset (Cornell Lab of Ornithology), accessed via GBIF.org, CC BY 4.0. Records from 2019–2024, aggregated and filtered by Birdfact. How these lists are made