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Northern Colletes : ウィキペディア英語版 | Northern Colletes
The Northern Colletes (''Colletes floralis'') is a species of bee within the genus ''Colletes''. Northern Colletes are solitary bees, though females may nest in what are termed ''aggregations'' – sites where the bees nest close together, but do not form colonies as social bees do.〔 They nest underground in soft (often sandy) soil, digging burrows up to 20 times the length of their bodies. It is often to be found nesting in coastal sand dunes and, on Hebridean islands, ''machair'' (coastal grassland). ==Appearance== The bees are medium-sized (with a head-to-body length of around 8–15 mm) and slender. They have a black abdomen, with narrow white bands on each segment. Tawny hairs cover the top of the thorax, with somewhat paler hairs on the face. They are very similar to other species within the ''Colletes'' genus and, if more than one of these species shares the same habitat, microscopic examination can be necessary to distinguish between them. Females are slightly larger than the males, possessing slightly longer abdomens, which are also darker and glossier.〔(【引用サイトリンク】title= Northern colletes (''Colletes floralis'') )〕
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