SWARM

Church Window Mask
SWARM

27 -29 June

The fleeting ‘SWARM’ installation on the church railings draws attention to the many smaller species of birds and insects that regularly make huge journeys South to North across the globe

  • ‘SWARM’ is on view from 27 to 29 June 2025

  • ‘SWARM’ is a project created by the Earth Justice Group at St James’s

  • The Journey of the Painted Lady

    The ‘SWARM’ installation on the church railings draws attention to the many smaller species of birds and insects that regularly make huge journeys, South to North, across the globe and the migration routes of which, and ability to survive, are already affected by climate change.

    Every year, the Painted Lady butterfly (Vanessa cardui) makes this migration in huge swarms, completing a round trip of 9,000 miles each season, more than 500m above our heads (that’s taller than the Shard which is 310m high).

    A global citizen and neighbour to us all.

    The journey takes several generations. Migrating butterflies have no direct knowledge of the route or experienced guides to follow.

    The Painted Lady is the most widespread of all butterflies, descending to breed all over the UK from Lands End to the top of the Shetlands.

    Painted Ladies feed and breed on over 300 host plant species – especially thistles.

    This project was partly created in relation to ‘The Herds’.

    What else you can do

    Join the Big Butterfly Count 18 July-10 August. Many species of butterfly are in trouble. Citizen Science initiatives provide crucial data to support conservation. It took the observations of 60,000 citizens to work out the details of Painted Lady migration. For more detail on how to become involved, please contact ecochurch@sjp.org.uk.