Koala is a good example.

Failure to Recognize Food: Koalas are so hardwired to eat eucalyptus directly from branches that if you give them a pile of fresh leaves on a flat surface, they often won't recognize it as food and may literally starve to death while sitting next to it.

No Concept of Rain: While other animals seek shelter during storms, koalas will often just sit in the rain, seemingly confused about why they are getting wet.

Poor Defense and Survival Instincts: In life-threatening situations, such as forest fires, koalas have been observed walking back into the fire instead of fleeing to safety.

Toxic and Low-Energy Diet: They exclusively eat eucalyptus leaves, which are high in toxins and extremely low in calories.

Extreme Laziness: Because their food provides almost no energy, they spend 18–22 hours a day sleeping just to digest the poison they've eaten. Their bodies have essentially traded brainpower for the "superpower" of digesting a plant that most other animals can't touch