Who is Martha?

"96-year-old ornithologist Luka Levadski foregoes treatment for lung cancer and moves from Ukraine to Vienna to make a grand exit in a luxury suite at the Hotel Imperial. He reflects on his past while indulging in Viennese cakes and savoring music in a gilded concert hall. Levadski was born in 1914, the same year that Martha--the last of the now-extinct passenger pigeons--died. Levadski himself has an acute sense of being the last of a species. He may have devoted much of his existence to studying birds, but now he befriends a hotel butler and another elderly guest, who also doesn't have much time left, to share in the lively escapades of his final days."--Page [4] of cover.