(a species of owlet moth (Noctuid)) Some caterpillars, after they emerge from their egg, can increase their weight by 25,000 times.

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Identify trees

Use the identification key, factsheets and other resources in this section to help you tell one tree from another. This will make your tree survey results more accurate.

When you have identified your trees please send us your survey results.

Let us know how easy to use the identification key is, and if you think there are ways we can improve it. Give us your feedback in the tree ID forum.

  • Tree branches against the sky
    Tree identification key

    You can use this interactive key to check the trees you have surveyed. Identification keys are tools used to identify species and the taxonomic groups they belong to.

  • Strawberry tree fruit
    Tree factsheets

    Identify and learn more about the most common street trees in Britain.

  • Tree-lined road
    Tree identification tips

    Which parts of a plant should you look at for identification, and when? Find out what you can do to make your identifications more accurate.

  • London street trees
    More tree identification guides

    More sources you can use to help you identify trees. These include both reference books and online tools.

  • Blossoming tree in garden
    How identification keys work

    Find out how identification keys can help you identify trees faster and more accurately.

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