What kind of snake is dark brown with brown squares on it's back, it's over 4 foot long found in suburban St. Louis.
The snake that is dark brown with brown squares on its back and is over 4 feet long is probably the Eastern Diamond Back rattle snake. The snake is found in most parts of St. Louis and is said to be the largest venomous snake in America. For more information, go to www.aaanimalcontrol.com/professional-trapper/wildlife/MO-St-Louis-Wildlife.htm.
Brown king snake or it's a rat snake
Rattle snake or highly unlikely but a diamond back
Squares? Or diamonds? Diamonds is a problem.