You know, the funny thing is, I can look at various entries in that chart, and the way the zombie is drawn, who killed it, and the weapon, and know EXACTLY what scene is being referenced.
Darryl's first kill, for instance, just shows a zombie head with the crossbow. That's the zombie that was eating the deer that he chased through camp. Someone lopped its head off with a shovel, and Darryl put an arrow through its eye.