Evasive Big Brown Snake Under Concrete Slab! We are getting a fair few calls this winter for big venomous snakes like Browns and Red Bellies that are enjoying the midday sun but as soon as they see someone they slither for cover in thick gardens or under concrete slabs. It took Chris and I two visits to catch this large Eastern Brown snake. The first time I was able to grab him by the tail but the snake got over half its body under the concrete slab. I didnt want to pull on the snake as that may