You see, I have given that much thought.
I have always thought that, when God was creating, He obviously had to delegate certain things, because He had a lot to do.
GOD: “Okay, who the heck created ticks and mosquitoes on my behalf? I specifically said things that CLUCK, not things that SUCK.” (Angels in the host all turn in unison and point at Ruprecht.)
Could be that God gave one more chance to another Angel who had been excused from creation duty, because he had no aptitude for it, but...they convinced God to give him another chance.
This Angel did a GREAT job except for one thing. When he wrote the code to have a squirrel cross the road...he fouled that up badly. Everything else was great, falling from tall trees and surviving, finding food, persistence, rudimentary problem solving, but...crossing roads?
It wasn’t much back in the day when an Ox was coming at you, but...today with oncoming cars? Eh. Not so much.