This is a matter of opinion and human-centered thinking.
Complexity is not a proof of being the top branch. In addition, we lack some advanced features other animals may have, such as echolocation, the ability to see UV light or senses related to electricity. Other animals may also have complex behavioral habits. We may not understand or value the behavioral or interior complexity of other species when the other species have been adapted to a different kind of environment, like whales.
What is not evident for me is the question whether other animals have more or less conscious relationship with God? Even if there were other species that have a relationship with God, humans have a special position in relation to God.