According to Dr. Breus, your chronotype is genetically predetermined. So just like your wide feet or slow metabolism, you don’t have a whole lot of say in the matter. Although, he does say your environment and other external factors do have something to do with your chronotype, to some extent.
Dr. Breus, who is a fellow of the American Academy of Sleep Medicine and diplomate of the American Board of Sleep Medicine, (this man loves to study sleep), determined there aren’t merely two types of people in the world. So you’ve got to think outside of the bird-box - ehem, not the Sandra Bullock flick.
The chronotypes are broken down into four different animal categories, each animal bearing similarities to the characteristics of each type of person associated with them.
You might be singing,🎵“One of these things is not like the other”🎵,but there’s a reason he threw a dolphin in there with the three furry land mammals.