The paper attempts to valorize the forest ecosystems basing on zooindication method with use of arbore− al ants. 2002 specimens, belonging to 17 species, were collected in the 'Lasy Spalsko−Rogowskie' Forest Promotional Complex (central Poland). Deciduous forest habitats (fresh mixed deciduous forest, moist deciduous forest and fresh deciduous forest) turned to be the most preferred, whereas the highest biodiversity was found on the marshy coniferous forest. Two relict and very rare species of the arboreal ants (Dolichoderus quadripunctatus and Camponotus fallax) were recorded for the first time ever.