Pictures: Rare Bees Make Flower-Mud “Sandwiches”

Publication: National Geographic News   Date: May 10, 2010   View Article

What appears to be part of a spring wedding bouquet is actually a nest for a rare species of solitary bee, a new study says.

Called a “flower sandwich,” the three-tiered arrangement consists of a thin layer of petals on the outside, then a layer of mud, and finally another layer of petals lining the inside of the chamber, according to study leader Jerome Rozen, a curator of invertebrate zoology at the American Museum of Natural History in New York.

At the core of the sandwich is the bee’s larva, which feasts on nectar and pollen deposited inside the chamber by its parent before the egg is laid and the nest is sealed.

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