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Llanishen Reservoir

32 ha

BirdsWildlifeSeasonal

Free entryDogs welcome32 ha

Getting here

51.52874, -3.17300

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Visiting this summer

Seasonal nature notes and what to look for now

🐦62+ species recorded in this area — summer evenings are best for activity; watch for Robin and Woodpigeon
🐕Dogs welcome — bring water in summer; the site has enough space to find shade on hot days

🌤️ Visiting this summer

🐦62+ species recorded in this area — summer evenings are best for activity; watch for Robin and Woodpigeon
🐕Dogs welcome — bring water in summer; the site has enough space to find shade on hot days

Good to know

£Free to visit — no entry charge
🐕Dogs welcome

Bike parkingParking

Best for

4 activities

Bird watching

Very strong match

Birds — Robin, Woodpigeon, Blackbird +59 more · last seen 2026; Birds — Robin, Woodpigeon, Blackbird +59 more · last seen 2026

Free

Wildlife

Very strong match

Multi-group wildlife — Birds, Mammals; Multi-group wildlife — Birds, Mammals

Free

Seasonal nature

Strong match

Plants — Wall Screw-moss, Common Cord-moss, Lateral Cryphaea +16 more · last seen 2026; Plants — Wall Screw-moss, Common Cord-moss, Lateral Cryphaea +16 more · last seen 2026

Free

Insect spotting

Good match

Insects — Stenophylax permistus, Trioza centranthi, Culiseta annulata +3 more · last seen 2026; Insects — Stenophylax permistus, Trioza centranthi, Culiseta annulata +3 more · last seen 2026

Free

Trails nearby

Within roughly 5 km

🚶

Walking

6 signed routes nearby

Signed route nearby

Wales Coast Path (South Wales)Walking route

Named routeRef WCPNational walking route

Penrhys PilgrimageWalking route

Named route

Rhymney River CircularWalking route

Named routeRef Rhymney River CircularLocal walking route

Rhymney Valley Ridgeway WalkWalking route

Named routeRef Rhymney Valley Ridgeway WalkRegional walking route

Taff TrailWalking route88 km

Named routeLength 88 kmRegional walking route

🚴

Cycling

96 signed routes nearby

Signed route nearby

Ely TrailCycling route

Named routeRef ETLocal cycle route

City Centre Hub (complete)Cycling route

Named routeRef CCLocal cycle route

Rhymney TrailCycling route

Named routeRef RTLocal cycle route

Route 8Cycling route

Named routeRef 8Local cycle route

Enfys 34Cycling route

Named routeRef 34Local cycle route

Cycleway 1 (Proposed)Cycling route

Named routeRef CW1Local cycle route

Wildlife to spot

93,000 records · National Biodiversity Network

Wildlife to spot

93,000 records · National Biodiversity Network

🐦

Birds46 species

winter

2026

Robin · Woodpigeon · Teal · Blackbird · Magpie +41

RobinErithacus rubecula
WoodpigeonColumba palumbus
TealAnas crecca
BlackbirdTurdus merula
MagpiePica pica
WrenTroglodytes troglodytes
MallardAnas platyrhynchos
Black-headed GullChroicocephalus ridibundus
Coal TitPeriparus ater
Blue TitCyanistes caeruleus
DunnockPrunella modularis
Great TitParus major
Tufted DuckAythya fuligula
ChaffinchFringilla coelebs
Long-tailed TitAegithalos caudatus
Little GrebeTachybaptus ruficollis
CootFulica atra
Mute SwanCygnus olor
Great Crested GrebePodiceps cristatus
House SparrowPasser domesticus
JackdawColoeus monedula2025
Carrion CrowCorvus corone2025
Lesser Black-backed GullLarus fuscus2025
RedwingTurdus iliacus2025
Canada GooseBranta canadensis2025
Green WoodpeckerPicus viridis
Grey HeronArdea cinerea2025
CormorantPhalacrocorax carbo2025
Great Northern DiverGavia immer2025
Herring GullLarus argentatus2025
Greylag GooseAnser anser
StarlingSturnus vulgaris
BullfinchPyrrhula pyrrhula
SiskinSpinus spinus2025
Common SandpiperActitis hypoleucos2025
Rock DoveColumba livia2025
GreenfinchChloris chloris2025
Grey WagtailMotacilla cinerea2025
Meadow PipitAnthus pratensis2025
GoldcrestRegulus regulus2025
Collared DoveStreptopelia decaocto2025
GadwallMareca strepera2025
Common GullLarus canus2025
Pied WagtailMotacilla alba yarrellii2025
KingfisherAlcedo atthis2025
Song ThrushTurdus philomelos2025

🐝

Insects6 species

winterspring

2026

Stenophylax permistus · Trioza centranthi · Culiseta annulata · 7-spot Ladybird · Yellow Meadow Ant +1

Stenophylax permistusStenophylax permistus
Trioza centranthiTrioza centranthi
Culiseta annulataCuliseta annulata
7-spot LadybirdCoccinella septempunctata
Yellow Meadow AntLasius flavus
Bay SuckerTrioza alacris

🌿

Plants18 species

winter

2026

Wall Screw-moss · Common Cord-moss · Lateral Cryphaea · Springy Turf-moss · Dilated Scalewort +13

Wall Screw-mossTortula muralis
Common Cord-mossFunaria hygrometrica
Lateral CryphaeaCryphaea heteromalla
Springy Turf-mossRhytidiadelphus squarrosus
Dilated ScalewortFrullania dilatata
Clustered Feather-mossRhynchostegium confertum
Crescent-cup LiverwortLunularia cruciata
Capillary Thread-mossBryum capillare
Hypnum cupressiformeHypnum cupressiforme
Anomalous Bristle-mossOrthotrichum anomalum
Elegant Bristle-mossOrthotrichum pulchellum
Forked VeilwortMetzgeria furcata
Many-fruited Thyme-mossPlagiomnium affine
Grey-cushioned GrimmiaGrimmia pulvinata
Common Pocket-mossFissidens taxifolius
Fox-tail Feather-mossThamnobryum alopecurum
Small Hairy Screw-mossSyntrichia laevipila
Lyell's Bristle-mossPulvigera lyellii

Species observations from the last 10 years via NBN Atlas

Wildlife to spot

93,000 records · National Biodiversity Network

🐦

Birds46 species

winter

2026

Robin · Woodpigeon · Teal · Blackbird · Magpie +41

RobinErithacus rubecula
WoodpigeonColumba palumbus
TealAnas crecca
BlackbirdTurdus merula
MagpiePica pica
WrenTroglodytes troglodytes
MallardAnas platyrhynchos
Black-headed GullChroicocephalus ridibundus
Coal TitPeriparus ater
Blue TitCyanistes caeruleus
DunnockPrunella modularis
Great TitParus major
Tufted DuckAythya fuligula
ChaffinchFringilla coelebs
Long-tailed TitAegithalos caudatus
Little GrebeTachybaptus ruficollis
CootFulica atra
Mute SwanCygnus olor
Great Crested GrebePodiceps cristatus
House SparrowPasser domesticus
JackdawColoeus monedula2025
Carrion CrowCorvus corone2025
Lesser Black-backed GullLarus fuscus2025
RedwingTurdus iliacus2025
Canada GooseBranta canadensis2025
Green WoodpeckerPicus viridis
Grey HeronArdea cinerea2025
CormorantPhalacrocorax carbo2025
Great Northern DiverGavia immer2025
Herring GullLarus argentatus2025
Greylag GooseAnser anser
StarlingSturnus vulgaris
BullfinchPyrrhula pyrrhula
SiskinSpinus spinus2025
Common SandpiperActitis hypoleucos2025
Rock DoveColumba livia2025
GreenfinchChloris chloris2025
Grey WagtailMotacilla cinerea2025
Meadow PipitAnthus pratensis2025
GoldcrestRegulus regulus2025
Collared DoveStreptopelia decaocto2025
GadwallMareca strepera2025
Common GullLarus canus2025
Pied WagtailMotacilla alba yarrellii2025
KingfisherAlcedo atthis2025
Song ThrushTurdus philomelos2025

🐝

Insects6 species

winterspring

2026

Stenophylax permistus · Trioza centranthi · Culiseta annulata · 7-spot Ladybird · Yellow Meadow Ant +1

Stenophylax permistusStenophylax permistus
Trioza centranthiTrioza centranthi
Culiseta annulataCuliseta annulata
7-spot LadybirdCoccinella septempunctata
Yellow Meadow AntLasius flavus
Bay SuckerTrioza alacris

🌿

Plants18 species

winter

2026

Wall Screw-moss · Common Cord-moss · Lateral Cryphaea · Springy Turf-moss · Dilated Scalewort +13

Wall Screw-mossTortula muralis
Common Cord-mossFunaria hygrometrica
Lateral CryphaeaCryphaea heteromalla
Springy Turf-mossRhytidiadelphus squarrosus
Dilated ScalewortFrullania dilatata
Clustered Feather-mossRhynchostegium confertum
Crescent-cup LiverwortLunularia cruciata
Capillary Thread-mossBryum capillare
Hypnum cupressiformeHypnum cupressiforme
Anomalous Bristle-mossOrthotrichum anomalum
Elegant Bristle-mossOrthotrichum pulchellum
Forked VeilwortMetzgeria furcata
Many-fruited Thyme-mossPlagiomnium affine
Grey-cushioned GrimmiaGrimmia pulvinata
Common Pocket-mossFissidens taxifolius
Fox-tail Feather-mossThamnobryum alopecurum
Small Hairy Screw-mossSyntrichia laevipila
Lyell's Bristle-mossPulvigera lyellii

Species observations from the last 10 years via NBN Atlas

Wildlife to spot

Photos

📷 John Lord · Geograph · CC BY-SA 2.0

Llanishen reservoir, Cardiff

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Nearby places

Useful places within 5 km

🌱Roath ParkUrban park2.2 km→🌱Sophia GardensUrban park5 km→🌱Roath Botanic GardensUrban park2.6 km→🌱Bute ParkUrban park4.2 km→🌱Bute ParkUrban park4.9 km→🌱Parc Waun FachUrban park1.7 km→

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