Pin Cherry aka Fire Cherry “grows in dry to moist clearings, open woods, woodland edges and disturbed sites. Its seeds sprout easily after a fire and can lay dormant for many years. In fact, it has its common name, Fire Cherry, due to its value as a reforesting agent after fires. It has another common name, Bird Cherry, that comes from the fact that birds use the fruits of this plant for food.”
Photos below taken July 25, 2021, northern Pennsylvania in a stand of mainly dead ash trees, as if killed by fire but rather by the emerald ash borer. The darker red these cherries the sweeter the fruit.