The Buckeye nut is the seed of the Aesculus glabra tree, commonly known as the Ohio buckeye. It is typically round and smooth, with a dark brown color and a lighter tan patch that resembles an eye. These nuts are often found in clusters and are a key feature of the tree, which is native to the central and eastern United States. While the Buckeye nut is visually appealing, it is important to note that it is toxic to humans and pets if ingested. The seeds contain compounds that can cause nausea and other symptoms. However, they are a favorite food for wildlife, including squirrels and deer, which can safely consume them.