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Squeamish bees

 

Many solitary bees gather the pollen from a single plant species or few closely related plants. Their period of activity is temporally adjusted to the flowering period of their plant host, and they spend the rest of the year in the state of dormancy, as larvae, in their nests. Their squeamishness provides them with a safe source of food, until the conditions in their environment change. This also leads to the development of a large number of bee species, for each adapts to its own plants. The genus Andrena has the greatest number of species in Europe, and most of them visit only their selected flowers.

 

Colletes hederae mining bees are active late in the autumn, when their nutritious plant, the ivy (Hedera helix), is blossoming.

The hosts of Andrena hattorfiana are solely Knautia and Scabiosa sp.

 

Andrena potentillae visits only the five-finger's (Potentilla sp.) flowers.

On loosestrifes (Lysimachia sp.), Macropis fulvipes bees gather floral oils instead of nectar with their specialized hairs.

 

 

Slovenian Museum of Natural History

                                Text and photographs by Andrej Gogala