No. of adults per 10,000 records

Number of adults reported for the species in every 10,000 records reported (covering all species). This roughly normalizes the numbers to allow one year to be compared with another regardless of how many records were submitted. This however assumes that the proportionate reporting of one species against another is constant from year to year, which is not the case. It may therefore reflect changes in recording behaviour as much as changes in a species' abundance. It is therefore a crude statistic to be used with care in association with the other statistics.
Percentage of all records

The number of records per year that were for this species out of all the records submitted that year (covering all species) expressed as a percentage.
 

Dingy Skipper

Dingy Skipper
 

Grizzled Skipper

Grizzled Skipper
 

Essex Skipper

Essex Skipper
 

Small Skipper

Small Skipper
 

Large Skipper

Large Skipper
 

Orange Tip

Orange Tip
 

Large White

Large White
 

Small White

Small White
 

Green-veined White

Green-veined White
 

Clouded Yellow

Clouded Yellow
 

Brimstone

Brimstone
 

Wall Brown

Wall Brown
 

Speckled Wood

Speckled Wood
 

Small Heath

Small Heath
 

Ringlet

Ringlet
 

Meadow Brown

Meadow Brown
 

Gatekeeper

Gatekeeper
 

Marbled White

Marbled White
 

Silver-washed Fritillary

Silver-washed Fritillary
 

Dark Green Fritillary

Dark Green Fritillary
 

White Admiral

White Admiral
 

Purple Emperor

Purple Emperor
 

Red Admiral

Red Admiral
 

Painted Lady

Painted Lady
 

Peacock

Peacock
 

Small Tortoiseshell

Small Tortoiseshell
 

Comma

Comma
 

Duke of Burgundy

Duke of Burgundy
 

Small Copper

Small Copper
 

Purple Hairstreak

Purple Hairstreak
 

Green Hairstreak

Green Hairstreak
 

White-letter Hairstreak

White-letter Hairstreak
 

Black Hairstreak

Black Hairstreak
 

Small Blue

Small Blue
 

Holly Blue

Holly Blue
 

Brown Argus

Brown Argus
 

Common Blue

Common Blue
 

Chalkhill Blue

Chalkhill Blue