Bird beast fish
Bird, Beast, Fish is a brain game where participants have to pay close attention.
You don't need any equipment for this game.
All players sit or stand facing the leader. The leader points at any random person and says either "bird", "beast", or "fish". The player pointed at then has to say the name (species) of this category. The leader (or the whole group) can slowly count up to 10 (or so). When the player cannot think of an animal of the correct category within that time, he is out of the game. Then, the leader points at another person and selects the next category.
Of course, during one round of the game, no species may be repeated. The last player to remain in the game wins!