Butterfly Conservation is running a series of events across the UK from May 19th to 27th encouraging people to get to grips with some of our most threatened and little-known butterflies.
You can search for the Marsh Fritillary in Northern Ireland and South Wales, help find new colonies of Chequered Skipper in the Scottish highlands or seek an audience with his majesty the Duke of Burgundy in West Sussex, England.
Guided walks, information sessions, videos and a downloadable identification sheet will help reveal the secret lives of overlooked species like the Green Hairstreak and the rapidly declining Wood White.
The mild winter and warm March followed by the wettest April on record have presented real problems for our butterflies this year.
Visit our beautiful reserves and partner sites during SOBW and see just how our butterflies are faring.
Many butterflies are in serious decline as habitat is lost to developments, intensive farming and roads.
Save Our Butterflies Week 2012 will highlight the butterflies we are most at threat of losing from Britain.
Dr Martin Warren, chief Executive of Butterfly Conservation, said: "Our butterflies have had to cope with unusual weather conditions this spring which may affect their fortunes later in the year.
"You can see our butterflies emerging this May by getting involved with Save Our Butterflies Week.
"We are running events at our reserves and other sites where people will be able to see rare butterflies at first hand and find out about the work we are doing to preserve them."
Download our identification chart and keep your eyes peeled for rare species.
Search our events listings for an activity near you.
Find out where our nature reserves are and start planning your visit.
A series of short films are in production. Visit our You Tubechannel to find out more about the measures being taken to protect endangered species and things you can do to help.
Join Butterfly Conservation between now and the end of May for half-price.