[Dimensio]

'If all of the current species are supposed to have evolved, why isn't there overwhelming fossil evidence of species in mid-transition. That is, where clear characteristics of the "from" and "to" species exist?

There are transitional fossils. The fact that you ask this question indicates that you've not done any actual research at all.

[PatrickHenry]

Transitional Vertebrate Fossils FAQ. Yes, transitional fossils exist.
Fossil whale with legs. Land animal to whale transitional fossil.
Feathered Dinosaurs.
Archaeopteryx. Reptile-to-bird transitional fossil.
Human Ancestors.

[G Larry]

I've done the research as noted in the post that follows yours, and the examples are lame.
Hundreds of lame examples are no substitue for a true mid-transition fossil.
Adaptation within a species is NOT the same as a transition from one species to another.