No. of Records

The number of records submitted for a species in each year. Fluctuations may indicate a change in distribution or abundance of a species, or changes in the recording habitats of the naturalists that recorded it.
No. of Adults per Record

The number of adults reported for a species divided by the number of records reported for that species. This gives a crude measure of "local abundance" independent to a degree of how many records were submitted or where people visited. Long-term trends may indicate real changes in abundance providing there are sufficient numbers of records to smooth-out anomalies.
 

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