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