Was Charlotte Pre-Historic?

So last night at bedtime we read the chapter from Charlotte's Web where Wilbur has a brief conversation with Charlotte before meeting her or even seeing her. She tells him to go to sleep and that in the morning she would reveal herself.

So I was tucking the kids in and asking what they thought Wilbur must be thinking. What did she look like, what kind of animal is she, would they be friends, etc. Then Isaac pipes up with "and does she know about dinosaurs".