To find food underground
To hide from birds that would eat them
To make a burrow to keep themselves cool in the summer
To make a nest for their young
They dig at random until they find one
They smell them
They memorized a map
They hear them
An egg
A waxy coating along the inside
Nectar and pollen
All of the above
To find females to mate with
400
10
1000
4000
Look for them places with many flowers
Do not be afraid of them
Be patient and observe them
Even native bees that can sting rarely sting people unless you scare or hurt them.
Most of the native bees in North America have already been studied.
In the bark of trees
In underground cells
In honeycombs
On flowers