Analysis of House, not home

Straw after straw, she collected
and spent days to build a nest
Far and wide, higher and lower
she flew continuous without a rest
Harsh sun and pouring rain
couldn’t dampen her burning zest
Adversities, enemies, obstacles, etc.
they all did her patience test
But she went on with brilliance
determined to remove every pest
And finally it was ready
the most beautiful and the very best
She celebrated her achievement
through a glittering grand fest
But, where was bliss, what was missing?
Without her eggs, it wasn’t a nest.