Snakes
Most snakes are venomous (The complete opposite, 82% of all snakes are non-venomous, with 11% being mildly venomous but not medically significant to humans, and only 7% potently venomous)
Black mambas/cottonmouths will chase you.
Birds are their own class of animals, spoiler alert, they’re actually reptiles, and if you look close enough, they share a huge amount of traits, even though their behaviors are similar.
Story credit – Reddit/felixrocket7835