Sefton Coast Wildlife

Large White

Pieris brassicae

UK Green ListEasy to see📍 Formby Beach
Season
April–October. Multiple generations; UK population boosted by continental immigrants in some years.
Best time of day
10am–4pm in sunshine
Sefton Coast
Common from April to October throughout the Sefton Coast
UK population
Very common; supplemented by regular immigration from the continent

Tap image to enlarge · Wikimedia Commons

Overview

The Large White is the other 'cabbage white' — bigger, stronger and more striking than Small White, with a large black wingtip that extends further down the wing. In good years, immigration from the continent swells UK numbers considerably. The yellow, black-striped caterpillars of the Large White are very different from those of the Small White (which are green and inconspicuous). Large Whites fly powerfully and cover more ground than Small Whites.

At a Glance

OrderLepidoptera
FamilyPieridae
HabitatDune grassland · Garden · Coastal farmland · Any open habitat
DietAdults: various flowers. Larvae: Brassicas — the other 'cabbage white' caterpillar.
UK populationVery common; supplemented by regular immigration from the continent
Sefton CoastCommon from April to October throughout the Sefton Coast
ConservationUK Green List

Where to See It

Open dune grassland and any open habitat on the Sefton Coast. Strong, powerful flier.

Identification

Large white butterfly. Extensive black wingtip on forewing. Females: two large black spots on forewing. Powerful flight. Larger than Small White. Underside more uniformly white.

Viewing & Photography Tips

A large, powerful white butterfly is likely Large White. The extensive black wingtip is obvious in flight.

Conservation Status

UK Green List

This species has a favourable conservation status in the UK and remains an important part of Sefton Coast biodiversity.

Frequently Asked Questions

Are Large White butterflies migrating to the Sefton Coast?

Yes. The UK Large White population includes both resident individuals and immigrants from the continent. In some years, large numbers cross the Channel and arrive on UK coasts including the Sefton Coast. These migratory movements — sometimes visible as streams of butterflies flying in from the sea — are one of the phenomena of coastal butterfly watching.

Related Species

Plan your visit to the Sefton Coast

Marshside RSPB, Formby pinewoods, Ainsdale NNR — practical guides to getting there, what to bring, and the best spots for each season.