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Lejops inhabit freshwater and brackish marshes near the coast, where adults can be found on Cyperaceae such as Scirpus maritimus and cattail (Typha). Lejota inhabit boggy stream margins and the edges of pools in open forest from the Picea forest zone up into the alpine grasslands. They are black hoverflies with a broad abdomen, the face lacks a facial knob. In Sweden this species appears to be associated with open, old growth mire forest of Betula and Populus tremula. In Poland the species is found on the edges of mature mixed forest. Lejota is usually found close to water and the flies settle on low-growing vegetation and harvested trunks of Picea. Leucozona are damp forest species that occur in the forest shade as well as on flowers along the forest edge. Their larvae prey on aphids.

Keywords: Betula; Lejops; Lejota; Picea forest zone; Poland; Populus tremula



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