A poem about an opossum

In The Oldest Living Thing in L.A., Larry Levis observes an opossum trying to cross Wilshire and Santa Monica. Sample:

A few steps forward, then back away from the breath
Of moving traffic. People coming out of the bars
Would approach, as if to help it somehow.
It would lift its black lips & show them
The reddened gums, the long rows of incisors,
Teeth that went all the way back beyond
The flames of Troy & Carthage, beyond sheep
Grazing rock-strewn hills, fragments of ruins...

It turns up on the poetry blog The Millennial Pedestrian, "poems about walking around in Central Park and other places."