My guess is that CT would have a lot of the same snakes as found in NY. I am not sure all of them would be present. One such as the Queen Snake might not be there, but many others would be. Here is a link to the NY State DEC herp map project that lists all the snakes in NY:
NY State Amphibian and Reptile Atlas Project Click on the link for snakes on the page that comes up, and you will get a list of the snakes in NY.
Best regards,
Glenn B