There can be only one. Locally we spent most of 2016 putting together a mystery. Our female tagged Hen Harrier known as Highlander had gone off line in April, most thought the bird was probably dead, then in October an adult tagged female appeared at a traditional site. To cut a long story short after going over all the evidence it became clear that she was still with us (immortal after all).
Other local highlights in 2016 were the high numbers of Barn Owls being reported until the vole crash. A nice adult Med Gull on my local patch, a Long-tailed Duck at Blackstone Edge, large numbers of Waxwings in the area, oh and we all dipped on a second Hoopoe in two years.