Adult blue banded bees fly only in warm months of the year (October to April).
After mating, female blue banded bees build a nest hole into the soft sandstone or clay. Cells at the end contain an egg and food (pollen and nectar) for the larvae when it emerges. A single hole can actually be a complicated maze of tunnels.
Although solitary, many blue banded bees may build their nest burrows in the same spot, close to one another, but it is not a colony. As the cold weather arrives all the adult blue banded bees die. The eggs in each nest develop but remain sealed in their cells, until the warm weather returns and they emerge as the next generation of adults.
Soft river banks are ideal nest sites for bbb's
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