From a biblical point of view, snakes and serpents were presumably created on day 5, since they are land animals.
The Serpent - novel - was created in 1963.
Serpent Throne was created in 2005.
Serpent eel was created in 1758.
Serpent Men was created in 1971.
The Cosmic Serpent was created in 1995.
Serpent's Tail was created in 1986.
The Serpent's Lair was created in 1999.
The Serpent's Gold was created in 1989.
Thy Serpent was created in 1994.
Serpent Dream was created in 1998.
Serpent Mage was created in 1992.
Serpent Island was created in 1954.