Grass Snake
- Group
- Reptiles
- Peak month
- May
- Records since 2000
- 8,979
Species recorded in Essex
1,113 species
Essex — county
Common Marsh-bedstraw
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 8,973
Common Field-speedwell
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 8,966
Vine's Rustic
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 8,964
Green Yoke-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 8,938
Tawny Mining Bee
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 8,881
Common Cardinal Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 8,863
Greater Bulb-fly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 8,814
Reed Canary-grass
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 8,811
Common Mallow
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 8,810
Hornet Hoverfly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 8,755
Rusty Swan-neck Moss
- Group
- Mosses
- Peak month
- September
- Records since 2000
- 8,651
Guelder-rose
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 8,622
Snout
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 8,616
Long-winged Conehead
- Group
- Grasshoppers and crickets
- Peak month
- August
- Records since 2000
- 8,597
Yellow and black longhorn
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 8,578
Common Pouchwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 8,512
Anomalous Bristle-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 8,502
Black Snipefly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 8,496
Goat Willow
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 8,468
Meadow Foxtail
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 8,431
Vestal Cuckoo Bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 8,401
Traveller's-joy
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 8,332
Common Footman
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 8,262
Black Clock
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 8,199
Rotund disc
- Group
- Molluscs
- Peak month
- April
- Records since 2000
- 8,184
Hedge Mustard
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 8,158
Thyme-leaved Speedwell
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 8,155
Alexanders [Smyrnium olusatrum]
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 8,145
Rainbow weed, Spiked loosestrife, Purple-loosestrife
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 8,145
Common Tachinid
- Group
- True flies
- Peak month
- August
- Records since 2000
- 8,124
Eriothrix rufomaculatus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 8,117
Queen Anne's Lace
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 8,098
Greater Bird's-foot-trefoil
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 8,081
Common Marble
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 8,079
Green Tiger Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 8,058
Bristly Oxtongue
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 8,049
Common adder
- Group
- Reptiles
- Peak month
- April
- Records since 2000
- 7,996
Candlesnuff Fungus
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 7,940
Rosulabryum rubens
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 7,932
Bright-line Brown-eye
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 7,916
Wood Dock
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 7,910
Lesser Burrdock
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 7,906
Halesus radiatus
- Group
- Caddisflies
- Peak month
- April
- Records since 2000
- 7,901
Flat Neckera
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 7,833
Mystacides azureus
- Group
- Caddisflies
- Peak month
- July
- Records since 2000
- 7,824
Black Bryony
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 7,792
Kentish Snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 7,788