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Blog
Sentinels – A vital tree network
For National Tree Week, we asked our volunteers to send in some examples of their favourite sentinel trees - Vicky Bolton, the Citizen Science Officer for Observatree, highlights some of their top picks.
Vicky Bolton • 04 Dec 2025
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Blog
The State of the UK’s Oaks
Professor Melanie Smith talks us through Action Oak's recent report on the state of the UK's precious oak trees.
Professor Melanie Smith • 07 May 2026
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Host of the Month: Birch and Bronze Birch Borer - March 2026
PDF • 1.25 MB
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About us
About us
Summary
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Sweet chestnut blight - Import and movement controls
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Chalara screening for resistence trials
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Resource Library
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About us
International Collaborations
Pests and diseases do not respect international borders.
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Blog
Volunteers to help survey historic trees
English Heritage are delighted to collaborate with Observatree, to allow Tree Health Surveyors access to English Heritage sites in support of the early warning system for tree health issues in England.
Christopher Weddell • 30 Mar 2018
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Blog
David Griffith, Tree Health Surveyor, goes above and beyond for tree health
David Griffith has been volunteering as a Tree Health Surveyor since 2014. Along with over 200 other volunteers involved in the project, David is tasked with surveying woods and trees for signs of pests and diseases including Chalara dieback of ash.
Helen Jones • 24 Apr 2017