Pandas: Meat eater by birth, determined to eat plants instead, something for which its digestive system is not suited, so it needs to eat massive amounts of it to survive. Then it picks a plant that dies when it blooms, effectively destroying all its food every 10 years or so. Then they're too stupid to reproduce in any significant amounts, which all adds up to basically the stupidest motherfucking animal on this planet. Except for Republican senators, maybe.
they're not stupid its just they've been hunted and zoo keepers didnt know the conditions in which pandas will think to themselves, "mmm yeah thats some fiine panda booty" but they've been making headway!!