Blank postcard of the Great Flight Cage at the National Zoological Park. Various birds are perched beside a waterfall and the pool below it. The message side is blank, but it has a printed note: ...

Blank postcard of a giraffe at the National Zoological Park. The giraffe is standing in its enclosure. The message side is blank, but it has a printed note: "Giraffe--The tallest of all mammals ...