Last week we shared the results of the study on urban biodiversity in the transformed schoolyards that Dr. Jaume Marlès has done as part of the COOLSCHOOLS project. This is a monitoring of the species of vegetation and invertebrates (arthropods) in 5 primary schools that have transformed their playgrounds (Cervantes, Vila Olímpica, Font d’en Fargas, Jaume I and La Maquinista) and in the parks most near these schools.