| Summary: | In Havelange (Belgium), two farms are experimenting an ecological transition. We aimed to evaluate the impact of their agricultural activities on insect pollinator communities. This article depicts the situation at the very early stage of the farm transition. This study supports the environmental benefits that the agricultural diversification with the maintenance of farm-level natural habitats can provide to the conservation of two important pollinator communities: wild bees and hoverflies.Over two years (2018-2019), by using nets and colored pan-traps, we collected 6301 of bee and hoverfly specimens among contrasted habitats within two farmsteads in ecological transition at Havelange (Belgium). In combination with the historical data of the region, we reported 101 bee species and morphospecies from 15 genera within 6 families and 31 hoverfly species and morphospecies from 18 genera. This list reinforces the national pollinator database including new distribution data in the region for extinction threatened species such as Andrena schencki Morawitz, 1866, Bombus campestris (Panzer, 1801), Eucera longicornis (L.), Halictus maculatus Smith, 1848 and Melitta tricincta Kirby, 1802 or for data deficiency species such as A. semilaevis Pérez, 1903, A. fulvata (Müller, 1766), A. trimmerana (Kirby, 1802) and Hylaeus brevicornis Nylander, 1852.
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