Isurus Arborae Americanus - North American Tree Shark The North American Tree shark was discovered by Kevin A. Cronin in 2003. The first of the species was spotted in central Massachusetts, occupying a tree in Westborough, MA. Within a year, a second of the species was seen ranging within the same territory. Typically, they run in size from small (2-feet), medium (3-4 feet), to large (6 feet +) - females being the larger of the species. A hardy breed, they can withstand exterior conditions of temperatures ranging from below zero to more than 100 degrees. In windy conditions, the sharks become very active - spinning, swimming and swirling in winds up to 50 mph.Their body shape, aerodynamics and weight allow them to point-up into winds - protecting them from damage. They are known to survive in conditions which range from winter blizzard to summer hurricane. They typically feed on birds, squirrels, and chipmunks - but no human has ever seen them feeding. At least one North American Tree Shark (#1), has been host to nesting birds for several years - and still holds the nest within her belly, although it has been some years since any eggs/hatchlings have lived there. A North American Tree Shark is ZERO threat to humans of any size, and they can be welcomed inside your home, or are able to spend decades outside, hanging around in a tree on your property. The sharks may be found in two primary types - aluminum or copper, both with stainless steel fasteners/cables. Each shark is unique, and bespoke sharks may be commissioned & acquired by contacting Kevin A. Cronin.