Chilean Government Uses Owls To Fight Hanta Outbreak

This year the Hanta virus has already caused 15 deaths in Chile, according to reports in The Santiago Times. It isn't always fatal—the 15 deaths were of a total of 36 cases over six months—but the symptoms are severe. Those affected experience flu-like symptoms, as well as nausea, vomiting, diarrhoea and trouble breathing. As is the case with many viruses, those most at risk of death are infants, the elderly, and anyone with compromised immune systems. But now Chile is using a novel method to fight the disease: owls.

The Hanta virus spreads via rodents' feces to humans. High-risk places include warehouses, sheds or rarely-used weekend homes that are left untouched for long periods, any building where rodents might enter and defecate. When a person enters the closed space, they may inhale the dust that contains tiny particles of the feces and with it, the virus. The virus expires when it is exposed to sunlight, so officials recommend opening the door to any enclosed space to let in air and entering only after an hour or so to open windows.

More people have been hit by the virus this year in Chile than before and experts believe it could be due to the many fires that have raged in almost all sectors of Chile. Officials are concerned that the fires pushed rodents, and the viruses they carry, into more densely populated areas, increasing the risk of exposure for the general population. The answer? Call in the birds. Specifically, owls.

CONAF, the governmental organization that administers forest policies and national parks in Chile, is working to encourage owl species such as barn owls (Tyto alba), known as lechuza blanca in Chile, and the Magellenic horned owl (Bubo magellanicus), known locally as Tucúquere to proliferate. Officials hope that by providing more nesting and breeding sites for the owls they will have more opportunities to mate and breed, increasing the population and thereby reducing the rodent population through predation. This entails building simple wooden boxes that serve as nests for the owls. Boxes were installed in the Reserva Nacional Lagos Peñuelas in 2002 and have been very successful, with the boxes producing around 30 chicks per year.

EDIT

http://news.mongabay.com/2014/0401-green-owls-hanta.html