Swans have nested in the little pond behind our house for at least fifty years...perhaps longer. In 2005, one of the pair who'd been coming back to nest every spring suddenly died of natural causes (old age, the local vet thought). His or her mate -- no way to tell which it was; swans are tough to sex -- stayed on the pond for months, returning again and again to the spot where it had last seen its mate alive. It returned last year, too, still looking for its counterpart. This year it seems not to have come back. But two youngsters have arrived. Here they are: Swan Trek, the Next Generation...