Sure, it is an animal. I quote Google for support: "A snake is an animal, and to be more specific, a carnivorous reptile."
This picture is from our visit to Katraj Snake Park in Pune last year. Since we keep cribbing about how there aren't enough parks or zoos to take kids to, we decided we should atleast go to the one which is there. It is famous as a snake park but it has a few other animals too. Don't ask me much, I did go there but I was caught up into minding the toddler. Plus, we had to return back after a while because it was time to close. That's what happens when you make sudden plans!