Never more than 10,000 in number, whooping cranes suffered from hunting, marsh destruction, and freshwater diversions, and declined to a record low of 15 to 16 at their winter quarters in the lower Texas coast in 1941. Worldwide crane populations have rebounded to roughly 600 currently, due to captive breeding, hunting bans, and habitat protection, but still are at risk from poaching, genetic bottlenecks, wind turbine and power line construction, and threats from chemical spills, intracoastal canal traffic, and coastal storms.