Exclusion for bat removal is a technique that is both humane and important in our modern society. Millions of people around the world revere bats because of their ability and tenacity in hunting and eating insects that generally are a nuisance to humans.
In the United States, and more importantly, in the northeast, bats are dying by the millions in a mass epidemic known as “White Nose Syndrome” (WNS) and the experts at the moment do not know why. That makes exclusion even more important than ever. When a species is facing dire survival conditions, any effort to exterminate them from a home or office building makes their chances of survival that much more difficult.
A study in 2008 determined that white nose syndrome is a fungus found on the muzzles, wings, ears and all exposed skin tissues of infected bats. This fungus grows at temperatures below 20 °C (68 °F) and grows on the bats when they are hibernating during winter. The fungus appears to disrupt the normal patterns of hibernation, causing bats to arouse from hibernation too early and starve to death. Symptoms associated with White Nose Syndrome include loss of body fat, unusual winter behavior (including flying), and death. No one yet knows how the condition spreads.