Listen - Noah was sorta preoccupied when he was building his ark. He had to not only build an enormous ship capable of housing two of EVERY SINGLE KIND OF ANIMAL on the planet, but he also had to gather up two of every animal. Including wasps, for whatever reason.
But he really kinda dropped the ball on unicorns. Yet, he still came so close.
Oh well, at least he made sure to get ticks.