That is a snake in the first photo.
If it is, then it non-poisonous and nothing to be concerned about.
I have encountered snakes at my place during every month of the year. There isn't a season for them. If it is above freezing, they may be out and about. Certainly any time that it gets up into the 50s and 60s, you may encounter them. If it gets into the 70s, you should be expecting to encounter them.