A hydroid
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 125
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- Biodiversity List – Northern Ireland
Biodiversity List – Northern Ireland
349 species
A hydroid
- Group
- Jellyfish, corals and anemones
- Peak month
- May
- Records since 2000
- 123
Green-Flowered Helleborine
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 121
Leatherback Turtle
- Group
- Reptiles
- Peak month
- October
- Records since 2000
- 121
Oysterplant
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 121
Davis’s river diver
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 120
Irish damselfly
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 115
Galium carpet
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 113
Dwarf bladder-moss
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 111
Garden dart
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 111
Purple ramping-fumitory
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 110
Small mouse-tail moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 110
Bent crisp-moss
- Group
- Mosses
- Peak month
- May
- Records since 2000
- 107
A stalked jellyfish
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 106
A waxcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 106
Pyramidal Bugle
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 106
Soft hornwort
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 104
Yellow-ringed carpet
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 99
Rockhopper beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 97
Small-White Orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 97
A fungus
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 96
Lurid cupola-moss
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 96
:: moss beetle
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 92
A lichen
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 91
Sei Whale
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 90
Allis Shad
- Group
- Fish
- Peak month
- June
- Records since 2000
- 89
Hyndman's sea cucumber
- Group
- Starfish and sea urchins
- Peak month
- July
- Records since 2000
- 88
Dark spinach
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 87
Orangeman
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 86
Stook grimmia
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 85
A bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 83
Loggerhead turtle
- Group
- Reptiles
- Peak month
- October
- Records since 2000
- 83
Dark leaved willow
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 81
A ground beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 80
A sea cucumber
- Group
- Starfish and sea urchins
- Peak month
- July
- Records since 2000
- 78
A chafer
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 76
A sea cucumber
- Group
- Starfish and sea urchins
- Peak month
- May
- Records since 2000
- 76
Chaffweed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 76
Elongated sedge
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 76
Dense-Flowered Orchid
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 74
Porbeagle
- Group
- Fish
- Peak month
- August
- Records since 2000
- 74
Bereft scavenger beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 72
Holt notchwort
- Group
- Liverworts
- Peak month
- May
- Records since 2000
- 71
Small Cow-Wheat
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 69
Irish daltonia
- Group
- Mosses
- Peak month
- June
- Records since 2000
- 68
Iridescent pea mussel
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 67
Ribbed extinguisher-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 67
New Forest beech-lichen
- Group
- Lichens
- Peak month
- January
- Records since 2000
- 65