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Butterfly Blog

Heatwave pause brings a mid-season high

23/6/2026

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Saturday was forecast to be the coolest day in the midst of an early season heatwave and so GH and BG chose it as the most suitable for transect 12. The day proved to be pleasantly warm with a mainly cloudy sky, but the butterflies seemed to approve and were out in reasonable numbers. They gave us our highest count of the year so far as we approached the halfway point of the transect season.
When we reached Fames Rough we saw that the lower path, forming our transect Section 3, was fenced off down its length for conservation grazing. To compensate, we walked the upper path (section 4), counting butterflies on both our outward and return walk. We reasoned that the sheep currently on Coneyboro Hill (pictured below) may soon be moved into the fenced area of Fames Rough. Last week the count was low but numbers for this transect shot up to 430 butterflies, our best result of 2026 to date – beaten only by the week totals of 517 (2020) and 435 (2017). The rise in numbers was due mainly to the surge in Marbled Whites, Meadow Browns, Ringlets and Small/Essex Skippers.
Count details:
​188 Marbled White
157 Meadow Brown
32 Small/Essex Skipper (3 confirmed as Small Skipper)
30 Ringlet
8 Small Heath
4 Large Skipper
4 Painted Lady
1 Common Blue
1 Dark Green Fritillary
1 Red Admiral
1 Speckled Wood
Count summary:
430 butterflies from 12 species.
If you would like to know more about any of the species mentioned, visit 
​butterfly-conservation.org

Butterflies of the week

Marbled White (Melanargia galathea) – the butterfly that looks like a chessboard in flight.  (Pair pictured above.)
  • Despite its black-and-white appearance, the Marbled White belongs to the brown butterfly family (the ‘browns’), not the whites.
  • It is one of the few British butterflies whose males and females are very similar in appearance, making them tricky to tell apart in the field.
  • Adults often gather in large numbers on flower-rich grasslands, creating spectacular midsummer displays as they drift across meadows.
  • When to see them in the UK: Typically June – August, with peak numbers usually occurring in July.
Picture
Small Skipper - Brian Gardner
Small Skipper (Thymelicus sylvestris) 
  • Despite its name, the Small Skipper is only slightly smaller than the similar Large Skipper, and is often identified by its bright orange wings and neat, darting flight.
  • Males have a distinctive dark scent mark on the forewing, used to release pheromones that help attract females.
  • The caterpillars spend the winter hidden in a silken shelter among grasses, emerging in spring to continue feeding before pupating.
  • When to see them in the UK: Typically June–August, with peak numbers usually occurring in July in flower-rich grasslands, field margins and nature reserves.
Picture
Conservation grazers on Coneyboro Hill - Brian Gardner
This week's survey by  Brian Gardner and Graham Harris submitted to 
​Butterfly Conservation (
UKBMS).
​Report by GK, BG & AI.
Marbled White pair header photo: Graham Kenward.
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Summer species take centre stage

16/6/2026

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We had intended to do the transect on Friday but, as the weather that day looked unfavourable, we made a last-minute decision in favour of the more promising Saturday. This proved to be a good choice as we were able to walk around in continuous warm sunshine – just the sort of weather to encourage butterflies.
Although the numbers recorded have dropped back from the record highs of the early season, the day’s count of 151 from 14 species was pretty well average for the time of year. The figures were helped along by seeing the summer’s first Small/Essex Skippers, Dark Green Fritillaries, Marbled Whites and Ringlets. These new arrivals helped compensate for our recording fewer Common and Holly Blues, Brimstones, Small Coppers and Dingy Skippers, many of which are now past their peak flight period.
We also had two rare sightings of 2 separate
Roe Deer, one on the top edge of Stagbury Field and the other at the Burgh Heath end of Fames Rough.
Count details:
​ 64 Meadow Brown
24 Marbled White
23 Small Heath
10 Brimstone
8 Small/Essex Skipper (5 identified as Essex, 1 identified as Small and 2 unconfirmed)
6 Large Skipper
5 Common Blue
3 Ringlet
2 Comma
2 Red Admiral
2 Dark Green Fritillary
1 Dingy Skipper
1 Speckled Wood

​Count Summary:

151 butterflies from 14 species.

This week's summer butterfly

Picture
Dark Green Fritillary - Brian Gardner
Dark Green Fritillary (Speyeria aglaja) – pictured above and at top.
  • One of Britain's largest fritillaries, it is a powerful flyer, often racing across open countryside so quickly that it can be difficult to follow with binoculars.
  • Despite its name, the butterfly isn't dark green above – the 'green' refers to the beautiful greenish-silver markings on the underside of its hindwings.
  • Females lay eggs near violets, but the caterpillars don't feed immediately. Instead, they overwinter as tiny newly hatched larvae before emerging to feed the following spring.
  • When to see them in the UK: Typically June–August, with peak numbers usually occurring in July on flower-rich grasslands, coastal dunes and heathland.
If you would like to know more about any of the species mentioned, visit 
​butterfly-conservation.org
This week's survey by  Brian Gardner and Liz North submitted to Butterfly Conservation (UKBMS).
​Report by GK, BG & AI.
Dark Green Fritillary header photo: Graham Kenward.
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    The Transect Team

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  • Home
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