People can clench and grind without being aware of it. It can happen during both the day and night, although sleep-related bruxism is often a bigger problem because it is harder to control. There is some disagreement about the cause of bruxism. Daily stress may be the trigger in many people.
The Blue Jay has a very large range, extending to around 6,700,000 square kilometers. It prefers a boreal temperate, subtropical, tropical forest ecosystem and is native to North America, Saint Pierre, and Miquelon.
Eastern bluebirds are primarily found east of the Rockies, and range from Canada to Mexico and Honduras. They are much admired for their lovely coloring and for a distinctive song that many hear as chur-lee, chur-lee.. The eastern bluebird is the state bird of both New York and Missouri. Western bluebirds are found west of the Rocky Mountains from Canada to Mexico.