Sightings summary: 2020

Annual overview of butterflies reported to the Dorset branch website*

91,098 adult butterflies of 49 species reported to the website this year.

Recording activity

Number of species records by date seen (scroll right for key).

Top butterflies

TIP: Click chart segments to see details.

Species count

Total records by species.

First sightings

Earliest dates on which adult butterflies were reported to the website.

TIP: Click column headers to sort table data.
Species Date
Adonis Blue 2020-04-27
Brimstone 2020-01-19
Brown Argus 2020-04-19
Brown Hairstreak 2020-07-12
Chalkhill Blue 2020-07-06
Clouded Yellow 2020-04-19
Comma 2020-01-19
Common Blue 2020-04-26
Dark Green Fritillary 2020-05-25
Dingy Skipper 2020-04-14
Duke of Burgundy 2020-05-02
Essex Skipper 2020-06-14
Gatekeeper 2020-06-09
Grayling 2020-06-14
Green Hairstreak 2020-04-08
Green-veined White 2020-03-16
Grizzled Skipper 2020-04-08
Holly Blue 2020-03-25
Large Skipper 2020-05-19
Large Tortoiseshell 2020-03-03
Large White 2020-03-24
Long-tailed Blue 2020-08-10
Lulworth Skipper 2020-05-07
Marbled White 2020-05-19
Marsh Fritillary 2020-04-26
Meadow Brown 2020-05-17
Orange Tip 2020-03-26
Painted Lady 2020-04-03
Peacock 2020-01-05
Purple Emperor 2020-06-23
Purple Hairstreak 2020-06-07
Red Admiral 2020-01-02
Ringlet 2020-06-05
Silver-spotted Skipper 2020-08-03
Silver-studded Blue 2020-05-25
Silver-washed Fritillary 2020-06-07
Small Blue 2020-04-25
Small Copper 2020-03-24
Small Heath 2020-04-22
Small Pearl-bordered Fritillary 2020-05-27
Small Skipper 2020-05-27
Small Tortoiseshell 2020-01-19
Small White 2020-03-01
Speckled Wood 2020-03-21
Swallowtail 2020-08-09
Wall Brown 2020-04-08
White Admiral 2020-06-04
White-letter Hairstreak 2020-06-15
Wood White 2020-04-19

Flight times

Duration between earliest and latest reported sightings of adult butterflies.

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*Please note: The charts shown on this page are drawn only from casual sightings submitted to this website. They are therefore not statistically significant, but do serve as an indication of what’s going on in the Dorset butterfly world. The records from this website will be added to a lot more data collected throughout the year, and used to compile the five-yearly Butterfly Atlases for Dorset and the UK. These are vitally important because they show the location of species and, over time, measure distribution changes and the possible effects of climate change. This gives us the information we need to help various species in appropriate ways.

Explore the sightings archive.