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