Steller's sea eagle
The Philippine eagle is typically reported as measuring in total length, but a survey of several specimens from some of the largest natural history collections in the world found the average was for males and for females. Based on the latter measurements, this makes it the longest extant species of eagle, as the average for the female equals the maximum reported for the harpy eagle and Steller's sea eagle. The longest Philippine eagle reported anywhere and the longest eagle outside of the extinct Haast's eagle is a specimen from Field Museum of Natural History with a length of , but it had been kept in captivity so may not represent the wild individuals due to differences in the food availability.