Spring Encounters with the Large Tortoiseshell

 After the incessant winter rain, it was lovely to get out into my local wealden woods during some beautiful early spring sunshine in March. 

After my encounters with the Large Tortoiseshell (Nymphalis polychloros) last summer, I was optimistic about seeing some post-hibernators during late February and March. I was not going to be disappointed.

Large Tortoiseshell (Nymphalis polychloros)

Here are three different individuals.

Comma (Polygonia c-album)

Peacock (Aglais io)

Dark-edged Beefly (Bombylius major)

On a dull day in early March, I came across this freshly emerged specimen in the grass. The grey front edges of the wings are yet to darken fully.

 

Vanessids in Sussex

 Vanessids and their relatives are a group of butterflies within the Nymphalidae family.

 In Sussex, they include some of our most attractive species, some of which are familiar to anyone with a buddleia in their garden. 

With the exception of the Purple Emperor (which is sexually dimorphic), the markings on males and females of this group are the same. The sexes can be separated by several subtle differences such as behaviour and abdomen shape. 

White Admiral (Limenitis camilla)

This elegant butterfly can be found flitting and gliding in and out of the woodland canopy in many mature woods in Sussex.

(male)

(female)

Purple Emperor (Apatura iris)

This impressive butterfly is a species predominantly found in the mature woodlands of West Sussex but it is occasionally reported further east in the county.

(females)

(male)

Red Admiral (Vanessa atalanta)

This is a common migrant to Britain and arrives during April and May. It is a continually breeding species, having no hibernation phase. Most head south in the Autumn but increasingly, many can overwinter in southern England as our winters become milder.

Painted Lady (Vanessa cardui)

Like the previous species, this is also a regular migrant to Britain, occasionally arriving in huge numbers. The majority head south in the Autumn and it is less inclined to overwinter in England.

The following four species all hibernate as adult butterflies during the winter. They are amongst the earliest butterflies to be seen in late winter and spring.

Large Tortoiseshell (Nymphalis polychloros)

The history of this species in Britain has been largely about periods of plenty interspersed with long periods of scarcity. It was declared extinct in Britain in the latter half of the twentieth century but in 2019/2020, it re-established itself as a breeding species. Perhaps it has always been the case that polychloros arrives on large scale migrations from Europe and can breed in Britain as long as weather conditions suit it. It is certainly breeding in Sussex once again.

(females)

Small Tortoiseshell (Aglais uticae)

This once common and familiar species has become worryingly scarce in Sussex in recent years. Whether it is moving northwards as the south becomes warmer and dryer, is unclear. There may be several factors at play.

(courtship)

Peacock (Aglais io)

Thankfully, this beauty is still a common butterfly in Sussex. Predominantly a single brooded species, it has taken advantage of our warming climate in the south and has regularly produced a second brood in recent years.

Comma (Polygonia c-album)

This is a common and widespread butterfly in Sussex. It hibernates in the open on tree trunks and the characteristic jagged wing margins probably help to prevent it from getting blown about in windy conditions. In warm spring and early summer weather, a proportion of paler orange adults (form hutchinsoni) occur in the summer brood.

(form hutchinsoni)

Early Autumn on Pevensey Levels

Since the beginning of September, the maize crop has been harvested for winter feed, the meadows have been mown and the hedgerows and tracksides have been cut back. The Environment Agency has already started raking the Floating Pennywort (an invasive species) from the water ditches and Pevensey Levels have a rather end of season feel about them.  

However, there is still plenty of  wildlife activity to be found.

Small Copper (Lycaena phlaeas) (3rd brood female)

Red Admiral (Vanessa atalanta)

Brown Argus (Aricia agestis) (2nd brood female)

Wall (Lasiommata megera) (3rd brood)

(male)

(female)

Comma (Polygonia c-album)

Peacock (Aglais io) (2nd brood)

The Peacock has predominantly been a single brooded species in Britain but during the last decade or more, a second brood has become an increasingly regular occurrence and on Pevensey Levels, there has been a significant second brood emergence this year.

Peacock (Aglais io)

 (final instar larva preparing to pupate on 31st August 2025)

(the larva had successfully pupated on 1st September 2025)

(the pupa on 5th September 2025)

A few days later I revisited the pupa to find that it had been dislodged during windy weather. It was suspended by just a very fine thread and spinning in the wind and I reluctantly brought it home for safe keeping.

(the darkening pupa on 14th September 2025)

(by 15th September 2025, the wing markings were visible through the pupal membrane)

(on the 16th September 2025, the imago has emerged)

(the imago was safely returned near to where it pupated)

Southern Migrant Hawker (Aeshna affinis) (male)

Migrant Hawker (Aeshna mixta) (male)

Golden-ringed Dragonfly (Cordulegaster boltonii) (male)

Cuckoo (Cuculus canorus) (juvenile)

Reed Warbler (Acrocephalus scirpaceus) (nest)

(this empty nest was exposed to view after trackside mowing)

Ruby Tiger (Phragmatobia fuliginosa fuliginosa)

(mature larva basking on reed stem)