Edna St. Vincent Millay

Cretaceous bird, your giant claw no lime
From bark of holly bruised or mistletoe
Could have arrested, could have held you so
Through fifty million years of jostling time;
Yet cradled with you in the catholic slime
Of the young ocean's tepid lapse and flow
Slumbered an agent, weak in embryo,
Should grip you straitly, in its sinewy prime.
What bright collision in the zodiac brews,
What mischief dimples at the planet's core
For shark, for python, for the dove that coos
Under the leaves? — what frosty fate's in store
For the warm blood of man, — man, out of ooze
But lately crawled, and climbing up the shore?