Horse-chestnut [tree]
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 15,030
Species recorded in York
446 species
York — county
European Hornet
- Group
- Bees, wasps and ants
- Peak month
- September
- Records since 2000
- 14,599
Tutsan
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 14,496
Smooth Newt
- Group
- Amphibians
- Peak month
- May
- Records since 2000
- 14,467
Yellow Archangel
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 14,460
Hawthorn Shieldbug
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 14,450
22-spot Ladybird
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 14,206
Golden Dung Fly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 14,206
Ladder-backed Hover Fly
- Group
- True flies
- Peak month
- April
- Records since 2000
- 14,120
Bittersweet
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 14,056
Primrose
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 13,713
Yellow Iris
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 13,607
Honeysuckle
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 13,575
Ground-elder
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 13,554
White-lipped Snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 13,376
Bush Vetch
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 13,352
Silver Birch
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 13,123
Crescent-cup Liverwort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 13,008
Soldier fly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 12,979
Red Dead-nettle
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 12,869
Pine Ladybird
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 12,843
Smooth Sow-thistle
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 12,637
Oxeye Daisy
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 12,477
Silverweed
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 12,032
Common Chickweed
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 11,998
Water Mint
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 11,367
Canada yew
- Group
- Conifers
- Peak month
- April
- Records since 2000
- 11,357
Creeping Cinquefoil
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 11,337
Pyramidal Orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 11,220
Colt's-foot
- Group
- Flowering plants
- Peak month
- March
- Records since 2000
- 11,051
Common Green Grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- July
- Records since 2000
- 11,050
Pineapple Weed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 11,025
Tufted Vetch
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 10,953
Grey Field Slug
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 10,855
Wild Teasel
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 10,799
Common Wasp, Common yellow jacket
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 10,694
Mugwort
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 10,551
Common Globetail
- Group
- True flies
- Peak month
- July
- Records since 2000
- 10,244
Butterfly-bush
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 10,146
Calvia 14-guttata
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 10,137
Birch Shieldbug
- Group
- True bugs
- Peak month
- August
- Records since 2000
- 10,114
Alder leaf beetle
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 10,095
Grousewing Caddisfly
- Group
- Caddisflies
- Peak month
- June
- Records since 2000
- 10,051
Shepherd's-purse
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 9,963
Field Horsetail
- Group
- Ferns and horsetails
- Peak month
- June
- Records since 2000
- 9,954
Turkeytail
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 9,862
Pendulous Sedge
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 9,859
Marsh-marigold
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 9,736