Maui Thrush (Myadestes lanaiensis ssp.)
This form is known only from reports from the 1850s as well as from subfossil remains that were recovered from deposits on the island of Maui, Hawaiian Islands.
Taken into account the fact that all known island forms of the species are considered distinct subspecies, the form that formerly inhabited the island of Maui, must also have been a distinct form.
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References:
[1] S. L. Olson; H. F. James: Descriptions of thirty-two new species of birds from the Hawaiian Islands: Part II. Passeriformes. Ornithological Monographs 45: 1-91. 1991
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edited: 17.11.2021