Snakes
Facts: Snakes are very beneficial to have around. They are one of the major controllers of the rodent population. Some also feed on insects, eggs and birds. In general, a snake will avoid contact with humans or other animals if it can. The majority of bites occur when the snake has no other option and it is being moved or feels the need to defend itself. The US is home to 128 snake speices and only about 15% (20 species) are venomous. WI only has 1 venomous species (Timber Rattlesnake) and they are only found in small pockets along the Mississippi river in the southern part of the state. While a bite from a venomous snake can cause serious injury, they are rarely fatal in the US.
Problem:
Snake in the window well: Like other animals, placing a 2x4 or sturdy stick at a diagonal in the window well should allow it to free itself. If it is unable to free itself, call your local animal control or rehab for assistance.
Snake in the yard: This is a good thing. This means that the snake has enough food and shelter to live comfortably. Generally the only way to get rid of a snake is to get rid of its food supply. This would include making the area not attractive to rodents by removing their food supply and shelter. Once the snake food supply is gone, the snake will follow.
Snake on the concete/rocks: This is normal behavior. Like all reptiles, snakes are cold blooded. This means they gather their warmth from the surrounding air/objects. A snake sitting on rocks or concrete is generally warming up for the day. A cold snake will be sluggish and not able to digest it's food properly. Once it is warm enough, it will go about its way.
Snake in the house: Usually a snake entering a house is either hunting a mouse or is seeking warmth. The most common snake to do this is a rat (black) snake. If you are comfortable and know the snake is non venomous, you can place a large garbage can or bucket on it's side and sweep the snake in with a broom. It can then be released outside. You can also place the bucket or garbage can over the snake and call animal control or an animal rescue. If the snake can not be seen but the entrance hole can be found, place a large (2 foot long) cone of window screen in the hole leading away from the hole. The narrow end should be on the away side. This will allow the snake to leave but not get back in. Once all the mice (or other food sources) are gone the snake will generally leave out the way it came.
Snake bite: Bites from non venomous snakes rarely need emergency medical attention. Stop any bleeding and then dress the wound. Follow up with your doctor to determine additional care. If the snake is venomous, remain calm and call 911. If possible get a picture of the snake to help with antivenin need. Do not try to treat or slow the venom by cutting the wound or trying to suck out the venom. If a pet is bitten by a venomous snake, get it to a vet ASAP. Keep the animal calm and if possible take a picture of the snake.