Because the Baltimore Ravens were named after the poem "The Raven" by Baltimore resident Edgar Allan Poe, it was natural to name their mascots after Poe. The three not only commemorated the famous Baltimore poet, but also represented three completely different personalities and their stereotypical relation to certain types of NFL players.
According to the back story, Edgar was the first to hatch. Edgar was tall and broad shouldered, representing the "backfield" or the players of the game routinely not staged on the line of scrimmage. This represented the linebacker, defensive back, fullback, quarterback, etc. Edgar was decidedly proud, if not arrogant, and was the leader of the trio.
Allan was particularly shorter and thinner than Edgar and especially Poe, yet much quicker. He represented the receivers and running backs. Allan was a very excitable bird who always had energy to spare.
Poe was the last to hatch. Poe is short and stout representing the linemen of the game. He is a slow, lazy, yet lovable mascot. Poe routinely joins tailgate parties in his never-ending search for the perfect cheeseburger.
After the 2008 season ended, Edgar and Allan were retired, leaving Poe as the sole mascot of the Baltimore Ravens.