Modern science has begun to understand sea birds: their epic voyages, their astonishing abilities to navigate for tens of thousands of miles on a featureless sea, their ability to smell their way towards fish and home. Only the poets in the past would have thought of seabirds as creatures riding the ripples and currents of the planet, though that is what the scientists are witnessing now, too. But a global tragedy is unfolding. The number of seabirds is in freefall: a 70% decline, a billion fewer now than there were in 1950.
