Evolution - why fall colors are different in Europe, US

Here’s a very simple explainer of why fewer bug problems mean European trees in fall are more yellow, less red.

TEMPUS FUGIT, DIES IRAE

The sun set
An hour earlier today
Than yesterday.
The leaves turned redder,
Or browner in this dry year,
And my hike ended at late dusk.
The time that flees is mine
More than the thirst-unquenched oak’s.
But the wrath that could be mine
At passed days and lost opportunities —
As the change of time reminds me
Of the change of life —
Is not, on many days, is not.
An emotional detachment often plays
In the pensively introspective
Key of B minor.
Tempus fugit, dies irae.

Red oak and eastern red cedar,
Windmill Hill Preserve,
DeSoto, Texas/Steve Snyder