#3 Crows Passing Down Grudges
Crows can memorize the specific facial features of a human who wronged them, and they will hold a grudge. But the creepy part is they communicate that face to other crows.
You can throw a rock at a crow once, and for the next five years, crows who weren’t even born yet will dive-attack you when you walk down that specific street. They literally pass down intergenerational hits.