(John Keats wrote much of the first line; I took care of the rest)

Where are the squirrels of spring? Ay, where are they?
Flattened by a log truck, just yesterday
When old enough to leave the family nest
They ran into the road, there flattened, pressed

Though cautioned by their wise sciuridaean sire
They panicked before an approaching tire
They had little time for a valedictory squeal
Before they died, so young, beneath the wheel –

So even if the old folks seem such a bother
You really ought to listen to your father