Greater White-fronted Goose
- Group
- Birds
- Peak month
- January
- Records since 2000
- 16,291
Species recorded in Essex
1,113 species
Essex — county
Meadow Vetchling
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,208
Cowslip
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 16,087
Light Brown Apple Moth
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 16,070
Marsh Thistle
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,059
Slow worm
- Group
- Reptiles
- Peak month
- May
- Records since 2000
- 15,975
Lady's Bedstraw
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 15,904
Green Emerald Damselfly
- Group
- Dragonflies and damselflies
- Peak month
- September
- Records since 2000
- 15,887
Swartz's Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 15,831
White-legged Damselfly, Blue featherleg
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 15,819
Common Bent
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 15,749
16-spot Ladybird [Halyzia sedecimguttata]
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 15,745
Hart's-tongue
- Group
- Ferns and horsetails
- Peak month
- May
- Records since 2000
- 15,670
Perennial Rye-grass
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 15,637
Black Redstart
- Group
- Birds
- Peak month
- October
- Records since 2000
- 15,620
Little Stint
- Group
- Birds
- Peak month
- September
- Records since 2000
- 15,586
Hairy Footed Flower Bee
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 15,558
Riband Wave
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 15,556
Fallow deer
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 15,521
Grey-spotted Sedgesitter
- Group
- True flies
- Peak month
- April
- Records since 2000
- 15,504
Clouded Yellow
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 15,481
Small Red-eyed Damselfly
- Group
- Dragonflies and damselflies
- Peak month
- August
- Records since 2000
- 15,356
Hover Fly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 15,338
Heath Spotted-orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 15,205
Gorse
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 15,116
Grey seal
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 15,095
Horse-chestnut [tree]
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 15,030
Roesel's Bush Cricket
- Group
- Grasshoppers and crickets
- Peak month
- July
- Records since 2000
- 14,752
Cat's-ear
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 14,718
Fox-tail Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 14,679
Hen Harrier
- Group
- Birds
- Peak month
- January
- Records since 2000
- 14,659
Common Smoothcap
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 14,629
European Hornet
- Group
- Bees, wasps and ants
- Peak month
- September
- Records since 2000
- 14,599
Lesser Bird's-claw Beard-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 14,503
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
Speckled Bush Cricket
- Group
- Grasshoppers and crickets
- Peak month
- July
- Records since 2000
- 14,459
Hawthorn Shieldbug
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 14,450
Bruch's Pincushion
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 14,229
Snow Bunting
- Group
- Birds
- Peak month
- November
- Records since 2000
- 14,211
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
Cinnabar
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 14,180
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
Shuttle-shaped Dart
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 13,962
Yellow-browed Warbler
- Group
- Birds
- Peak month
- October
- Records since 2000
- 13,959