在明尼苏达州，松鼠蛀食是造成树上形成大叶球的罪魁祸首。 In Minnesota, squirrel dreys are responsible for big leaf balls in trees.

明尼苏达州树上的大叶球不是鹰巢；它们实际上是由松鼠形成的。 Big leaf balls in Minnesota trees aren't hawk nests; they're actually formed by squirrels. 松鼠收集树叶和树枝来建造称为“dreys”的隔热巢穴。 Squirrels collect leaves and twigs to create insulated nests called "dreys." 产生这种误解的原因是，一些松鼠巢穴看起来与鹰等猛禽的巢穴相似。 The misconception arises because some squirrel dreys resemble the nests of raptors like hawks. 红尾鹰是明尼苏达州常见的一种鸟类，它们也在树上筑巢，这可能会与松鼠巢混淆。 Red-tailed hawks, a common Minnesota bird, also construct nests in trees, which can be confused with squirrel dreys.