A creationist can embarrass an evolutionist by asking for a definition of species.
Time was God's first creation.
There are also scientific problems with the concept that each of the creation days was a long period of time.
Being made in the image of God, man was the crown of creation.
Following the creation concept that creation processes differed from preservation processes, it is suggested that God endowed each created kind, at the time of its creation, with potential for vast variety.