I found this and several other garters like it in a drained, wooded, drained spaginum marsh near my house in central Ontario, Canada. Butler's are not known in my area but have been found in iscolated populations about 75 miles, 125 km, to the north and also to the south a little further. I have posted photos in the photo gallery under garter snakes. there should be one photo below and a link to another. I sent these photos to some herpetologists and herp societies and they all agreed it was a butlers garter. Then I told the Conservation Authority responsible for the area and the said it was just an eastern garter.

my other garter pic


