Green areas can represent, in a large University such as Pisa, a very important ecological resource, capable of contributing, on the one hand, to improving the welfare of the academic community, making work and study more pleasant and comfortable, and, on the other hand, to mitigating the environmental impact of the University’s buildings and activities, thanks to the innumerable ecosystem services connected to vegetation. Trees and green areas, moreover, can represent biodiversity elements in urban areas, providing food and sheltering/nesting sites for spontaneous life forms.