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