Has anybody else here noticed some sort of seasonal variation in what type of food your garters prefer? I've only had garters for a relatively short while, but I'm fairly certain I already see some sort of pattern.

I feed mine mice, fish and worms. Worms are available for just a part of the year, so I can't say much about them. But it seems to me that my snakes almost refuse (they are generally reluctant) to eat mice for about four months of the year, October-January, clearly preferring fish. The rest of the year they seem to take mice as readily as fish, maybe even preferring to eat mice.

As I understand it, they do have seasonal dietary variation in the wild. But in captivity..?