The Vale of Aylesbury is one of the few places where Black Poplar still grow in the wild. It is the most endangered species in the UK. They are a wetland tree and much of the recent development of such sites has reduced their numbers to critical.
Black Poplar is the food plant for the caterpillars of many moths, including the Hornet, Wood Leopard, Polar Hawk and Figure of Eight. The catkins provide an early source of pollen and nectar for bees and other insects and the seeds are eaten by birds.