Bass Rock is home to around 50,000 pairs of breeding gannets each year. Apparently, if a young gannet chick falls out of the nest, it is abondoned by it's parents. I think I also read somewhere that a pair of gannets only raise one chick per year, but may be mistaken about this.
Anyway, the local boat operator ( of Sula II ) rescues any such chicks that he finds, and raises them in his back garden, with a view to releasing them back into the wild.
Meanwhile, mum and dad are somewhere below :-