The time of day that most snakes are active is at night. This is when they prefer to hunt since they can do so under the cover of darkness, out of sight of predators and the prey they stalk. However, some snake species prefer very hot temperatures and are strictly active during the day.

Groundhogs have a strong aversion to powerful scents, including garlic, ammonia, vinegar, hot peppers like cayenne, and predator urine. Various herbs such as rosemary, lavender, basil, mint, sage, thyme, and oregano can also act as deterrents. You can strategically use these odors around your property by planting these crops near your garden and by the entrances to groundhog burrows. Commercially available repellents offer another option, and for best results, scent-based deterrents should be used alongside other preventive measures.

Simply put,  there are much better approaches than using mothballs. Mothballs contain chemicals that can easily permeate a frog's delicate skin, leading to health problems. But it's not limited to just frogs; other animals and the environment could also face negative impacts. The US Environmental Protection Agency (EPA) has taken action. It emphasizes the importance of adhering to label instructions for products like this and not moving forward with off-label use.

Since they are cold-blooded, snakes find cool toilet bowls attractive, especially during hot weather. Or they may be seeking to escape the plumbing and find a spot in your home where they can warm up on a cold night. Snakes may also be looking for food.