This species and the Yellow-billed Teal are sometimes considered conspecific under the name Speckled Teal (A. flavirostris), but increasingly taxonomists treat the two as distinct species.
It resembles other snake-eagles and was once believed to be conspecific with the Short-toed Snake Eagle and Beaudouin's Snake Eagle.
The Blue Mockingbird has historically been considered conspecific with the closely related Blue-and-white Mockingbird.
The species was once considered conspecific with the Red Shining Parrot of Vanua Levu and Taveuni, but is now considered its own species.
It is closely related to the more southerly breeding Naumann's Thrush T. naumanni; the two have often been regarded as conspecific.
The species is sometimes considered to have been conspecific with the Iphis Monarch.
The species is sometimes considered conspecific with the Brown Honeyeater.
The species was once considered to be conspecific with the Varied Honeyeater, but it is now treated as a separate species.
The species was formerly known as Pericallia integra Matsumura, 1931, but specimens from Taiwan are not conspecific to those from the Philippines, where N. integra (F. Walker, 1855) occur.
It is closely related to the more northerly breeding Dusky Thrush T. eunomus; the two have often been regarded as conspecific.
The species is sometimes considered to be conspecific with (the same species as) the Scarlet Myzomela of Australia.
It has often been considered conspecific with the Asian and Black-billed Koels, but they are increasingly treated as a separate species.
It is similar in plumage to the Scarlet Robin of Australia, and until recently the two were considered conspecific until split in 1999 by Schodde and Mason.
It was formerly considered to be conspecific with the Grey Laughingthrush, G. maesi.
It was previously considered conspecific with the White-throated Laughingthrush, G.
It was formerly considered conspecific with Black-fronted White-eye, Zosterops minor, but work by Pamela C. Rasmussen and her colleagues showed that it is a separate species.
This fish was formerly sometimes viewed as conspecific with either the Greenland shark, Somniosus microcephalus, or the Pacific sleeper shark, Somniosus pacifius.
In 2004, BirdLife International split the Spectacled Petrel, Procellaria conspicillata, from the White-chinned Petrel, Procellaria aequinoctialis, which had been considered conspecific or even a color morph.
The species is named in honour of Mr. Jari-Pekka Kaitila, who was the first to recognize that the specimens representing Teleiodes kaitilai, are not conspecific with Teleiodes saltuum.
It was formerly considered to be conspecific with the Epaulet Oriole.
It is sometimes considered conspecific with its southern counterpart, the Red-fronted Tinkerbird, Pogoniulus pusillus.