KNOW YOUR JAYS!
The top one is a Blue Jay. They live in middle and eastern North America. If you live on the west coast, the bird you saw was NOT a blue jay. Note the crest on the head.
The bottom one is a Scrub Jay. They live in middle and western North America (with a small population in Florida). If you live in western North America and you thought you saw a blue jay, it was actually a scrub jay. Note the lack of crest.
Reblog if you want people to stop calling scrub jays “blue jays”.