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Botflies, also known as Cuterebra, are a genus of flies found primarily in North and South America. These flies are known for their unique reproductive habits, in which the females lay their eggs on or near the nests of small mammals such as squirrels, rabbits, and rodents. Once the eggs hatch, the larvae burrow into the host animal's skin, where they develop and eventually emerge as adult flies.In North America, botflies are most commonly found in the eastern and central regions of the United States, as well as parts of Canada. They have been reported in states such as New York, Pennsylvania, Ohio, and Michigan, as well as provinces like Ontario and Quebec. Some species of botflies are also found in the southern United States, including Florida and Texas.In South America, botflies are found throughout the continent and are particularly common in Brazil, Argentina, and Venezuela. They have also been reported in other countries in the region, such as Colombia, Ecuador, and Peru.Botflies can also be found in other parts of the world, although they are less common. For example, some species have been reported in Europe, Africa, and Asia.The adult botflies are not harmful to humans but the larvae can cause a condition known as Cuterebrosis. Cuterebrosis is caused by the botfly larvae that burrow into the skin of mammals. This can cause discomfort, itching, and even infection. In humans, the larvae most commonly burrow into the scalp, face, or neck.In most cases, the larvae will eventually emerge on their own, but in some cases, they may need to be removed by a medical professional. Prevention of botfly infestation is best achieved by avoiding contact with wild animals and their nests or burrows, or by keeping pets treated with insecticides.In conclusion, botflies are found primarily in North and South America, but can also be found in other parts of the world. They are known for their unique reproductive habits and can cause a condition known as Cuterebrosis. It's important to be aware of botflies and the risks they pose, especially if you live in an area where they are common, or if you spend a lot of time outdoors.