How does the distribution of entrances differ between solitary nesters and communally nesting furrow bees?

Answer

Solitary bees create individual, often scattered holes, whereas communal species may have several closely spaced entrances servicing one larger complex

Solitary bees create individual, separate holes, but communally nesting species might show several closely spaced entrances connected to a single, larger underground structure.

How does the distribution of entrances differ between solitary nesters and communally nesting furrow bees?
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