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Officer Snodgrass of the White House police force holds a captured opossum that strayed onto White House grounds, May 6, 1929. From the National Photo Company collection. View full image.
Scary little things, opossums. Eek.
Calvin Coolidge and his family would probably have been made this opossum into a family pet. The Coolidges seem to have kept quite a menagerie of fairly tame animals during their time at the White House.