Nature has evolved in some crazy ways. Even though it was necessary for survival or whatever, I still hate it. 

 

1. The Cyclocosmia Spider has a crazy "aztec coin" butt to block it's home from predators.

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via pinterest

2. Pelicans will often eat other smaller birds like bullies with wings.

via reddit

3. The Tardigrade, aka "Water Bear" can survive in environments so extreme, we would totes die if we even tried. 

via featuredcreature

4. Flatworms are way into penis fencing (it's exactly how it sounds). Whoever loses gets inseminated by the winner, and turns female. 

via imgur

5. The Horned lizard squirts blood out of it's eyes to ward off predators. So...it's the devil.

via National Geographic