While the nature of consciousness itself is still unclear, the products of consciousness are quite evident. A few of the perks of human level consciousness include:
The capacity for complex expression through language and money
Formation of large, structured social groups
The freedom to accept or refuse ethical behavior
The ability to inquire, understand, and manipulate our environment
It would seem to me that there are commonalities, albeit of a smaller scale, between human level consciousness and ant level consciousness.
Communicate through scent trails
Form large, structured groups
Accept or refuse to follow the colony's consensus decision
Explore and manipulate their environment
These are just four fundamental principles that I believe exist across any level of consciousness, just to a greater or lesser degree depending on the species.
If we plot levels of consciousness on a spectrum, such as:
Bacteria - Ants - Birds - Dogs - Humans (feel free to fill in the gaps, but you get the idea)
What might a species more evolved than humans be capable of? For instance, an alien race or Artificial Intelligence.