Ok, so playing Devil's advocate here we'll accept QC's proposition that God created all distinct species out of thin air. It is estimated that 99.9% of all species (plant, animal and other) that have ever existed are extinct - Newman, Mark. "A Mathematical Model for Mass Extinction". Cornell University. May 20, 1994.
According to the journal Nature, there are 8.7 million eukaryotic species currently on the earth, of which 86% of land species and 91% of marine species remain undiscovered.
What's the fugging point of creating billions upon billions of species only to let them die out? Also, how the heck did Noah cram two breeding pairs of 8.7 million species aboard a creaky wooden box just 4000-odd years ago? If you trot out the "kinds" argument I'm gonna slap you upside the head, though, because that would presuppose hyper evolution on a massive scale.