I hate getting up in the mornings.  I much prefer the evenings
Yes a night owl is usually someone who stays up late, but the opposite is an early bird, a lark as opposed to an owl. I wonder why they pick birds?
I do not know why they pick birds - that is a good question!
In Scandinavia, they call them differently. Early birds are called A-people and night owls are called B-people.
That is interesting to know.  I wonder how other countries do it
I'm not sure but I know that researchers call them "morningness" and "eveningness". So many different names!
That is curious.  I wonder why some people are one way versus the other
Well they think it has to do with the circadian timing system which different people have and make 2 different choronotypes.