My first's an incredible youngster.
My second takes time to complete.
My third's an acrobatic contraption.
My fourth can be used to compete.
My fifth can mean one plus one half.
My sixth is a final two tether.
My seventh will make all the difference.
What am I when my parts come together?
Each line references a single word, with each word being pretty much unrelated to the desired animal. Once the words are interpreted correctly, you'll find the name of the dissected animal I seek. Keep in mind that the spacing is intentional.
Clarification first: I accidentally lied. One of the answers is actually two words. A few of the words are similar/synonymous, so finding one will help you find the rest. For the first line, one of the words would be more correct as a proper noun.