Similar to the life cycle of the paper wasp, the inseminated queens of the bald-faced hornet emerge from overwintering in the spring to choose a nesting site for her colony. These hornets build an aerial nest that will vary in location from shrubs, tree limbs, eaves, sides of houses, sheds, or other structures. Throughout the spring and early summer months, these nests will often go unnoticed by the homeowner as they start out very small in their early stages. By mid to late summer, the nest will grow at an exponential rate and, seemingly overnight, a rather large nest will emerge. Bald-Faced Hornet nests can grow to the size of a basketball or a beach ball and can be home to over 400-600 hornets at their peak. Bald-Faced Hornets are flying insects that can be very dangerous as they attack in swarms if they feel their nest is threatened.