The book of Genesis talks about "kinds", not species. A kind is most commonly a genus, not a species. Sometimes as with humans, a kind is a species, but other times it can be as broad as a family. Lots of variation occurs within kinds very quickly (but within limits) and speciation does thus occur but all this proves is that variation can cross the boundaries of a classification which man has created. The bible did not describe kinds based on what man would one day label as "species", so speciation therefore is arbitrary and means nothing. Nevertheless, evolutionists will often point to it as evidence for their (whole) theory of single celled organisms becoming all life we see today as if a finch population varying and adapting (within its kind) to become another species of finch is the same thing.
Researchers have bred a million generations of butterflies and still all we see are butterflies. A butterfly is a butterfly. That is its kind. It never evolved from anything else and will never evolve into anything else in spite of what the drawings in the textbooks portray without the evidence to back it up.