Looking for a fast-growing oak tree that provides plenty of acorns for wildlife? Look no further than the Quercus acutissima, also known as the sawtooth oak. Originally native to regions in Asia, this tree has become widely planted and naturalized in parts of North America. Its acorns tend to bear heavier crops than other native American oak species, making it a popular choice for wildlife food provision. Though the acorns are very bitter, they are still eaten by jays, pigeons, and squirrels. This medium-sized deciduous tree can grow up to 90 ft tall, with leaves that have regularly-featured, saw-toothed triangular lobes. Plant the Quercus acutissima in deciduous forests at an altitude of up to 7,000 feet for optimal growth.