This weekend is the start of National Tree Week 2010 so why not help Natural History Museum scientists with the Urban tree survey and identify the trees in your garden?
Are these leaves from an elder or ash? Find out in the Urban tree survey. © Università di Trieste, Dipartimento di Biologia. Photo: Andrea Moro
So far nearly 6,000 trees have been mapped by people across the UK, in one of the biggest tree surveys ever in the UK.
The survey results will help scientists get a more detailed picture of today’s urban tree landscape, see how it has changed over time and help other researchers find out if climate change is affecting tree flowering and fruiting times.
In National Tree Week (27 Nov to 5 Dec), organisers the Tree Council highlight how Britain is one of the least wooded countries in Europe. New tree planting has fallen to its lowest level in more that 30 years.
Trees are being lost or weakened by more and more things, like new diseases and more extremes in weather, they say.
The Tree Council would like you to plant more trees. So before you do, find out what trees you already have with the help of our guide to 80 of the most common ones in the urban tree survey www.nhm.ac.uk/trees.