While the pear itself is not necessarily poisonous, the seeds inside are dangerous if consumed. The seeds of Bradford pears contain small amounts of cyanide.
Bradford pear trees, also known as Callery Pears, are often used for landscaping aesthetics. The trees offer a symmetrical shape and produce white flowers which adds beauty to yards. Despite the attractive appeal however, they also pose problems for many homeowners. Once the trees begin to bloom, the flowers emit a fishy smell, and as the fruits begin to form, they fall and create messes. The fruit can also pose a hazard for wildlife because the poison inside can cause birds and other small animals to become sick if consumed. Eating large amounts of the seeds can also cause death.