Source please.
Remember, you claim that the definition of "genocide" SPECIFICALLY states humans killing humans.
Are you serious? Do you really need a dictionary to define words only? You cannot define words from the contexts in which the words are given?
By now you should understand the same word CAN HAVE multiple contexts.
I have yet to see a context where genocide is not a crime and does not refer to a human being COMMITTING the act. That is there are no animals committing genocide.
Please provide a source where genocide refers to non human beings.
You should be able to think for yourself without running to dictionaries or WIKI.
If you are suggesting that I chose a poor way in the wording I used to express what I meant I can agree with that. Here is a better version:
The concept of genocide specifically expresses the idea that a human being is committing an act against OTHER a human beings . . .
Again non humans cannot commit genocide.