Giraffe or Unicorn Chorus

This is just the main chorus. I hope to post the complete song (with a slightly more complicated arrangement and greater production values) in about a week.
Here are the Chorus lyrics:
Which is more realistic? A giraffe or a unicorn?
A long-necked cheetah camel? Or a horse that has a horn?
Which would more surprise you, when seen with your own two ops.
A camelopardalis or an equine ceratops?
Anybody know (or want to guess) the meanings of the terms used toward the end of the chorus?