O is for Opossum.
look closely at the paws
"The common opossum's scientific name is Didelphis marsupialis, and the Virginia opossum's scientific name is Didelphis virginiana"
"Like other marsupials,
opossums have thumbs, called an opposable hallux, on their paws. These thumbs are on the back feet as well as on the front feet. Their tails are prehensile and can be used to help them climb and hold onto tree branches. "
http://www.livescience.com/56182-opossum-facts.html
"North America's only marsupial (female has a pouch) mammal."
https://www.opossum.org/facts.htm
found at the Topeka Zoological Park, photographed through the fence of the enclosure with the K 3 + the big guy (plus) HD PENTAX-D FA 150-450mm F4.5-5.6 ED DC AW + HD Pentax-DA 1.4x AW AF Rear Converter