In 2006 we found the first adult next to a railroad. We thought this was an escaped one. Also in 2009 and 2010 we found one and named it an escaped animal.
In 2015 we found 8 including 2 juveniles.
In 10 years we found 25 pieces.
Last week railroad workers found a snake and when the took the rails away for a repair the found the eggs.
The problem is that all the snakes are on a very busy railroad where it isn't possible to do a good search.