The Robins in February

Two robins fly on a branch in February...
The naturalists lie through their ignorance.
"It's not uncommon to see the bird
"In winter time." Yet, I never have until today.
Never once, in thirty-two years
Have I seen a robin in February.
The Blackbirds had I seen,
And in one week, the Robin?
A sure sign of spring,
Should the Robin tarry in winter
It means eternal spring.
It means, unfortunately, the climate
Is changing. There is no way
A half-millennia's worth of wisdom is wrong.