Editorial's buzz : humans are clever?

As we the animals or in a great word "humans" call our self human.Are we ?
I want to put on a question to you, don't panic it is very simple..
Q)who is the smartest animal in the earth?

I am sure you know it and your brain is shouting that we, we the humans are the smartest people in the earth..but please think once that, who declared this thing that we are the smartest one???

if u wanna buzz plz comment.....haha