POLSKIE P I S M O ENTOMOLOGICZNE P O L I S H JOURNAL OF ENTOMOLOGY VOL. 75 : 511-538 Bydgoszcz 31 December 2006 Bees (Hymenoptera: Apiformes) in the Narew National Park JÓZEF BANASZAK Institute of Biology and Environmental Protection, Kazimierz Wielki University, 12 Ossoli ńskich Av., 85-093 Bydgoszcz, Poland; e-mail:
[email protected] ABSTRACT . In wetlands and adjacent habitats in the Narew National Park (northeastern Poland), 125 species of Apiformes were recorded. The bee diversity of the area was distinguished by very high contributions of Andrenidae (particularly of Andrena s. str.) and Apidae, but relatively low contributions of Megachilidae and Anthophoridae. Characteristic species include Bombus jonellus , while Andrena fulva has its easternmost locality there . KEY WORDS: wild bees, Apoidea, Apiformes, Narew National Park, wetlands . INTRODUCTION The Narew National Park comprises the valley of the middle section of the river Narew in northeastern Poland (about 50 km northwest of the Białowie ża Forest). This is one of the largest and best-preserved areas of wetlands in Poland. The wetlands cover over 95% of the bottom of the Narew valley. The Narew NP includes a 35-km-long section of the river, between Sura ż town in the south and the village of Rz ędziany in the north (Fig. 1). This section of the river has numerous anastomosing distributaries, i.e. streams that leave and link up again with the main river, forming an irregular, complicated network. The Narew valley within the Park is flat and waterlogged, and its width ranges from 2 to 4 km (Banaszuk 2000, Gradzi ński 2001).