I don’t think any reasonable person would go, “oh, owl egg for sure.” You might ask someone what animal they would be, not what type of animal egg. In conclusion this screenshot is a farce

Fabergé.

You could also make this a joke about being trans, but not realizing it yet. In the trans community we refer to people who’re trans but haven’t realized it as “eggs” because they haven’t hatched yet. Anyway, there are the seeds of a good joke there!