Sanford's sea eagle was discovered by and named after
Dr Leonard C. Sanford, a trustee for the
American Museum of Natural History. The first description was by
Ernst Mayr in 1935. The "sea eagle" name is used to distinguish the
species of the genus
Haliaeetus from the closely related
Icthyophaga true fish eagles. The species was described in 1935 by
Ernst Mayr who noticed that earlier observers had overlooked it, thinking it was a juvenile of the
white-bellied sea eagle. It forms a
superspecies with the
white-bellied sea eagle. As in other sea eagle species pairs, the other
taxon is white-headed. These two are
genetically very close, it seems; their lineages separated not longer than 1 million years ago, probably only in the
Middle Pleistocene, a few 100,000 years ago. Both share a dark
bill,
talons, and eyes with the other
Gondwanan sea eagles. == Description ==