After the glory of autumn color drops away there will be many poison ivy berries left hanging.
The actual size of the berries is just about the size of peppercorns, maybe a tiny bit bigger.
Clearly, birds like the berries and eat them but they don’t like them that much. Because come spring, many poison ivy berries can still be seen hanging in these little clumps.
Some clumps are huge, with hundreds of berries.
And by the way, only the climbing poison ivy vines have flowers and berries: the ground vines reproduce by sending out shoots and don’t both with flowers and berries.