The answer to this question depends on how you define "looking up." If you're asking about the physical ability to tilt the head upwards, then most animals can look up into the sky. However, some animals, like snakes, have limited neck mobility and cannot look upwards.
Snakes are known for their long, slender bodies and lack of limbs. Their necks are also quite short and inflexible. They rely on their eyes to see their surroundings, but their limited neck movement restricts their ability to look directly upwards.
Here are some other examples of animals with limited neck mobility:
- Fish: Fish live in an aquatic environment and their bodies are designed for swimming, not looking upwards.
- Insects: While some insects, like dragonflies, have flexible necks, others, like ants, have limited head movement.
It's important to note that even animals with limited neck mobility can often see the sky through their peripheral vision.