What use are biting horseflies?
All animals, birds and insects have their place in the ecosystem, scientists say. But what good is a horsefly, really?
Last year so many rodents roamed Norwegian forests that residences were overrun, from mountain cabin attics to house basements. This summer in southern Norway, rodent numbers have plummeted to roughly one-hundredth of what they were just a year ago. Yet no one really knows what’s powering these enormous population swings.