The term 'Nile Biters' refers to a species of snake known as Aspis, which is found in the Nile River region. These snakes are venomous and have a reputation for being aggressive, hence their nickname. They are usually brown or black in color and can grow up to two meters in length. Aspis are considered to be one of the most dangerous snakes in the world, and they are responsible for many human deaths each year.