
I have noticed that in order for bees to get nectar from flowers with a very small bloom it will sometimes pierce the bloom at the stem end.

I have noticed that in order for bees to get nectar from flowers with a very small bloom it will sometimes pierce the bloom at the stem end.
I have never noticed that they do that. I tend to keep my distance from the bees though. I've been stung too many times when I was younger.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." Thomas Jefferson, 1791
Coincidental confirmation
I observed this very same thing for the first time myself just yesterday. I have a shrub by my porch that bears tiny white, trumpet-shaped flowers. The honeybees and bumblebees love it, and so do the carpenter bees. But I noticed yesterday that some of the carpenter bees weren't sticking their fat heads in the blossoms, but rather were checking the base of them from outside instead.
Thoreau was right: what's the virtue in traveling the world o'er when there's so much to be discovered right in our own backyards.