Get to know the lichens being recorded in the OPAL Air Survey. Click on an image below to learn more.

Nitrogen-sensitive

Intermediate

Nitrogen-loving

Can't identify a lichen?

• Follow the illustrated key of common British lichens on the Key to Nature website
• Upload your picture to iSpot and let enthusiasts and experts identify your lichen for you
• Explore the lichens on twigs guide on the Natural History Museum website

Want to learn more?

• View an interactive slideshow on British lichens on the Key to Nature website
• British Lichen Society