With the official start of summer approaching, plenty of people have their windows open to let in some fresh air.And when leaving the windows open, you might expect the occasional breeze, raindrop or insect to make its way into the house.A house in Colorado got an unexpected visitor when a bear recently saw an open window as an invitation to pay a visit.Heidi Hannah captured a video of the bear hanging by its claws from a second-floor window in Steamboat Springs, which is in Northern Colorado.Eventually, the bear made it inside the house and then made its way out of the home via another window on the ground floor.See the video of the bear climbing through the window in the video player above