What follows is a complete list of all animals I have observed from my window:
- Golden eagle
It appears that animals fall into three distinct categories: feathered, hairy, and neither. The snail poses the biggest challenge because it has no legs. It was also the only animal without feathers that lays eggs in my list for almost a year.
For some time, I felt that snails must be an anomaly. Perhaps snails are actually bugs, but then I discovered the snake. It was another animal with neither hair nor feathers and has no legs. This turned my understanding of animals on its head.
Thus, I think the three classes of animals are best described as:
- Those with feathers. These animals always fly, lay eggs, and have legs.
- Those with hair. These animals always have legs. They never lay eggs.
- Those with neither feathers nor hair. These animals always lay eggs, but most do not have legs.
I observe that animals that lay eggs never have hair. Thus, we might subdivide a different way if we use a tree structure.
- Egg layers: Never have hair
- Feathered flyers: always have legs
- Non-feathered, non-fliers: may have legs
- Non-egg layers: always have hair, always have legs.
I admit, there’s quite a few ways to begin describing these clusters. I’ll update this post if I observe more animals.