Buck's-horn Plantain
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,894
Species recorded in Essex
1,113 species
Essex — county
Mint Moth
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 4,877
Meadow Plant Bug
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 4,871
Hirta Beetle
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 4,861
Box tree moth
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 4,859
Honesty
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 4,830
Heath Speedwell
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,824
Quack Grass
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,798
Sweet Violet
- Group
- Flowering plants
- Peak month
- March
- Records since 2000
- 4,784
Small-leaved Elm, Jersey Elm, English Elm
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,773
Dotted Loosestrife
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,769
Square-tailed Worm
- Group
- Worms (annelids)
- Peak month
- April
- Records since 2000
- 4,751
Pectoral Sandpiper
- Group
- Birds
- Peak month
- September
- Records since 2000
- 4,746
Wavy Beard-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 4,738
Pellucid Four-tooth Moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 4,733
Dwarf Swan-neck Moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 4,704
Heart and Club
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 4,700
Common Centaury
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,676
Least Carpet
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 4,668
Woundwort Shieldbug
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 4,664
Woodland Red Ant
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 4,639
Carder Bumble Bee
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 4,638
Tortoise Bug
- Group
- True bugs
- Peak month
- August
- Records since 2000
- 4,626
Least Duckweed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 4,623
Mink
- Group
- Mammals
- Peak month
- September
- Records since 2000
- 4,610
Water Figwort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,605
Six-spot Burnet
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 4,601
White Poplar
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 4,578
Small Black Ant
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 4,560
Minute Pouncewort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 4,557
Two-banded wasp hoverfly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 4,512
Limnephilus auricula
- Group
- Caddisflies
- Peak month
- May
- Records since 2000
- 4,503
Common Poppy
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,491
Cherry Plum
- Group
- Flowering plants
- Peak month
- March
- Records since 2000
- 4,436
Dwarf Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 4,434
Caper Spurge
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,369
Nettle-tap
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 4,367
Scentless Mayweed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,357
Tipula oleracea
- Group
- True flies
- Peak month
- May
- Records since 2000
- 4,355
Hemlock
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,351
Burnet Companion
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 4,344
Red-backed Shrike
- Group
- Birds
- Peak month
- September
- Records since 2000
- 4,335
Walnut
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,332
Aspen
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,330
Hop
- Group
- Flowering plants
- Peak month
- September
- Records since 2000
- 4,303
Large Bindweed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,274
Fat-hen
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 4,271
King Alfred's Cakes
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 4,250