Alder
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 16,859
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- Species by county
- Halton
Species recorded in Halton
375 species
Halton — county
Curlew Sandpiper
- Group
- Birds
- Peak month
- September
- Records since 2000
- 16,711
Ramsons
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 16,569
Nipplewort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,456
Common Orange Lichen
- Group
- Lichens
- Peak month
- April
- Records since 2000
- 16,366
Cowslip
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 16,087
Lady's Bedstraw
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 15,904
Hart's-tongue
- Group
- Ferns and horsetails
- Peak month
- May
- Records since 2000
- 15,670
Little Stint
- Group
- Birds
- Peak month
- September
- Records since 2000
- 15,586
Gorse
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 15,116
Horse-chestnut [tree]
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 15,030
Cat's-ear
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 14,718
Tutsan
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 14,496
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
Ground-elder
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 13,554
Annual Meadow-grass
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 13,548
Wood Sandpiper
- Group
- Birds
- Peak month
- August
- Records since 2000
- 13,506
Silver Birch
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 13,123
Red Dead-nettle
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 12,869
Smooth Sow-thistle
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 12,637
Jack Snipe
- Group
- Birds
- Peak month
- October
- Records since 2000
- 12,579
Oxeye Daisy
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 12,477
Caspian Gull
- Group
- Birds
- Peak month
- January
- Records since 2000
- 12,452
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 Pipit
- Group
- Birds
- Peak month
- January
- Records since 2000
- 11,870
Prickly Sow-thistle
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 11,523
Rhododendron
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 11,503
Male-fern
- Group
- Ferns and horsetails
- Peak month
- May
- Records since 2000
- 11,400
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
Colt's-foot
- Group
- Flowering plants
- Peak month
- March
- Records since 2000
- 11,051
Narrowleaf Vetch
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 11,032
Pineapple Weed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 11,025
Hemp-agrimony
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 10,961
Tufted Vetch
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 10,953
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
Black Medick
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 10,508
Wild Cherry
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 10,464
Curled Dock
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 10,374
Dogwood
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 10,200
Common Reed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 10,169
Butterfly-bush
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 10,146
Common Cord-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 10,099
Alder leaf beetle
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 10,095